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How to Write an Annotated Bibliography

What is an Annotated Bibliography?

An annotated bibliography is an enhanced list of citations that briefly summarizes each article, book, or other source of information and explains why it is important for your topic.  It can be divided into two distinct parts: the annotation and the bibliography.

There is not an official format for annotated bibliographies, though usually the bibliographic citation is written in APA or MLA format.  If this is being done for a class, ask the instructor which format you should use. ​

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Example of entries on an Annotated Bibliography

Henderson, R., & Honan, E. (2008). Digital literacies in two low socioeconomic classrooms: Snapshots of practice. English Teaching: Practice and Critique, (7)2 , 85-98.

Provides snapshots of digital practices in two middle-level classrooms within low socioeconomic suburbs in Australia during one school term. Ethnographic research techniques were used to investigate (1) teachers' pedagogical approaches to using digital literacy practices with low-income students; (2) students' access to digital technologies at home and at school; and (3) how home literate practices compared to the practices valued in school. Results underscore the need to disrupt teachers' deficit views of these students' home digital literacies so that school practices can be built upon the knowledge and literacies students already have. 

(Beach et al., 2009)

Frazen, K., & Kamps, D. (2008). The utilization and effects of positive behavior support strategies on an urban school playground. Journal of Positive Behavior Interventions, 10, 150-161. doi: 10.1177/1098300708316260.

This study examined the effectiveness of a school-wide PBS recess intervention across three grades—2 nd , 3 rd , and 4 th .  The intervention included a token economy system for following five operationally defined, positively stated school rules.  A multiple baseline design across grades was used to determine the effectiveness of the swPBS recess intervention on inappropriate behaviors.  Intervention was implemented across the three grades at staggered times.  When intervention was implemented, inappropriate behavior demonstrated a change in level for all grades and a decrease in variability for one grade (2 nd ). Trend was relatively stable across all phases for two classrooms and a slight increasing trend was observed during baseline for the 4 th grade that stabilized once the intervention was implemented. Experimental control was demonstrated when (1) baseline behavior remained consistent despite the implementation of intervention in other grades, (2) only when intervention was implemented was a change in behavior level observed, and (3) experimental control was demonstrated at three distinct points. 

(McCoy, 2015)

Why are Annotated Bibliographies useful?

An annotated bibliography demonstrates your understanding of a topic.  It's easy to add a source to a reference list and forget about it when you just need a citation, but you will read and evaluate that source more carefully when you have to write an annotation for it. Since annotations need to be more than just a summary and explain the value of each source, you are forced to think critically and develop a point of view on the topic.  Writing an annotated bibliography is a great way to start preparing a major research project because you will see what arguments have already been proposed in the literature and where your project can add something new to the larger body of work.

Reading published scholarly annotated bibliographies is an efficient method for starting research since they will provide a comprehensive overview of a topic and introduce what other researchers are saying about a topic.

Beach, R., Bigelow, M., Dillon, D., Dockter, J., Galda, L., Helman, L., . . . Janssen, T. (2009). Annotated Bibliography of Research in the Teaching of English.  Research in the Teaching of English,   44 (2), 210-241. Retrieved from http://www.jstor.org/stable/27784357

McCoy, D. (2015). Annotated bibliography #1 behavior research methods [Class handout]. Behavior Analysis, University of Cincinnati, Cincinnati, OH.

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How to Write an Annotated Bibliography - APA Style (7th Edition)

What is an annotation, how is an annotation different from an abstract, what is an annotated bibliography, types of annotated bibliographies, descriptive or informative, analytical or critical, to get started.

An annotation is more than just a brief summary of an article, book, web site, or other type of publication. An annotation should give enough information to make a reader decide whether to read the complete work. In other words, if the reader were exploring the same topic as you, is this material useful and if so, why?

While an abstract also summarizes an article, book, web site, or other type of publication, it is purely descriptive. Although annotations can be descriptive, they also include distinctive features about an item. Annotations can be evaluative and critical as we will see when we look at the two major types of annotations.

An annotated bibliography is an organized list of sources (like a reference list). It differs from a straightforward bibliography in that each reference is followed by a paragraph length annotation, usually 100–200 words in length.

Depending on the assignment, an annotated bibliography might have different purposes:

There are two major types of annotated bibliographies:

A descriptive or informative annotated bibliography describes or summarizes a source as does an abstract; it describes why the source is useful for researching a particular topic or question and its distinctive features. In addition, it describes the author's main arguments and conclusions without evaluating what the author says or concludes.

For example:

McKinnon, A. (2019). Lessons learned in year one of business.  Journal of Legal Nurse Consulting ,  30 (4), 26–28. This article describes some of the difficulties many nurses experience when transitioning from nursing to a legal nurse consulting business. Pointing out issues of work-life balance, as well as the differences of working for someone else versus working for yourself, the author offers their personal experience as a learning tool. The process of becoming an entrepreneur is not often discussed in relation to nursing, and rarely delves into only the first year of starting a new business. Time management, maintaining an existing job, decision-making, and knowing yourself in order to market yourself are discussed with some detail. The author goes on to describe how important both the nursing professional community will be to a new business, and the importance of mentorship as both the mentee and mentor in individual success that can be found through professional connections. The article’s focus on practical advice for nurses seeking to start their own business does not detract from the advice about universal struggles of entrepreneurship makes this an article of interest to a wide-ranging audience.

An analytical or critical annotation not only summarizes the material, it analyzes what is being said. It examines the strengths and weaknesses of what is presented as well as describing the applicability of the author's conclusions to the research being conducted.

Analytical or critical annotations will most likely be required when writing for a college-level course.

McKinnon, A. (2019). Lessons learned in year one of business.  Journal of Legal Nurse Consulting ,  30 (4), 26–28. This article describes some of the difficulty many nurses experience when transitioning from nursing to a nurse consulting business. While the article focuses on issues of work-life balance, the differences of working for someone else versus working for yourself, marketing, and other business issues the author’s offer of only their personal experience is brief with few or no alternative solutions provided. There is no mention throughout the article of making use of other research about starting a new business and being successful. While relying on the anecdotal advice for their list of issues, the author does reference other business resources such as the Small Business Administration to help with business planning and professional organizations that can help with mentorships. The article is a good resource for those wanting to start their own legal nurse consulting business, a good first advice article even. However, entrepreneurs should also use more business research studies focused on starting a new business, with strategies against known or expected pitfalls and issues new businesses face, and for help on topics the author did not touch in this abbreviated list of lessons learned.

Now you are ready to begin writing your own annotated bibliography.

Annotated bibliographies may be arranged alphabetically or chronologically, check with your instructor to see what he or she prefers.

Please see the  APA Examples page  for more information on citing in APA style.

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What Is an Annotated Bibliography? | Examples & Format

Published on March 9, 2021 by Jack Caulfield . Revised on August 23, 2022.

An annotated bibliography is a list of source references that includes a short descriptive text (an annotation) for each source. It may be assigned as part of the research process for a paper , or as an individual assignment to gather and read relevant sources on a topic.

Scribbr’s free Citation Generator allows you to easily create and manage your annotated bibliography in APA or MLA style. To generate a perfectly formatted annotated bibliography, select the source type, fill out the relevant fields, and add your annotation.

The Scribbr Citation Generator will automatically create a flawless APA citation

The Scribbr Citation Generator will automatically create a flawless MLA citation

An example of an annotated source is shown below:

Annotated source example

Table of contents

Annotated bibliography format: apa, mla, chicago, how to write an annotated bibliography, descriptive annotation example, evaluative annotation example, reflective annotation example, finding sources for your annotated bibliography, frequently asked questions about annotated bibliographies.

Make sure your annotated bibliography is formatted according to the guidelines of the style guide you’re working with. Three common styles are covered below:

In APA Style , both the reference entry and the annotation should be double-spaced and left-aligned.

The reference entry itself should have a hanging indent . The annotation follows on the next line, and the whole annotation should be indented to match the hanging indent. The first line of any additional paragraphs should be indented an additional time.

APA annotated bibliography

In an MLA style annotated bibliography , the Works Cited entry and the annotation are both double-spaced and left-aligned.

The Works Cited entry has a hanging indent. The annotation itself is indented 1 inch (twice as far as the hanging indent). If there are two or more paragraphs in the annotation, the first line of each paragraph is indented an additional half-inch, but not if there is only one paragraph.

MLA annotated bibliography

Chicago style

In a  Chicago style annotated bibliography , the bibliography entry itself should be single-spaced and feature a hanging indent.

The annotation should be indented, double-spaced, and left-aligned. The first line of any additional paragraphs should be indented an additional time.

Chicago annotated bibliography

For each source, start by writing (or generating ) a full reference entry that gives the author, title, date, and other information. The annotated bibliography format varies based on the citation style you’re using.

The annotations themselves are usually between 50 and 200 words in length, typically formatted as a single paragraph. This can vary depending on the word count of the assignment, the relative length and importance of different sources, and the number of sources you include.

Consider the instructions you’ve been given or consult your instructor to determine what kind of annotations they’re looking for:

These specific terms won’t necessarily be used. The important thing is to understand the purpose of your assignment and pick the approach that matches it best. Interactive examples of the different styles of annotation are shown below.

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A descriptive annotation summarizes the approach and arguments of a source in an objective way, without attempting to assess their validity.

In this way, it resembles an abstract , but you should never just copy text from a source’s abstract, as this would be considered plagiarism . You’ll naturally cover similar ground, but you should also consider whether the abstract omits any important points from the full text.

The interactive example shown below describes an article about the relationship between business regulations and CO 2 emissions.

Rieger, A. (2019). Doing business and increasing emissions? An exploratory analysis of the impact of business regulation on CO 2 emissions. Human Ecology Review , 25 (1), 69–86. https://www.jstor.org/stable/26964340

An evaluative annotation also describes the content of a source, but it goes on to evaluate elements like the validity of the source’s arguments and the appropriateness of its methods .

For example, the following annotation describes, and evaluates the effectiveness of, a book about the history of Western philosophy.

Kenny, A. (2010). A new history of Western philosophy: In four parts . Oxford University Press.

A reflective annotation is similar to an evaluative one, but it focuses on the source’s usefulness or relevance to your own research.

Reflective annotations are often required when the point is to gather sources for a future research project, or to assess how they were used in a project you already completed.

The annotation below assesses the usefulness of a particular article for the author’s own research in the field of media studies.

Manovich, Lev. (2009). The practice of everyday (media) life: From mass consumption to mass cultural production? Critical Inquiry , 35 (2), 319–331. https://www.jstor.org/stable/10.1086/596645

Manovich’s article assesses the shift from a consumption-based media culture (in which media content is produced by a small number of professionals and consumed by a mass audience) to a production-based media culture (in which this mass audience is just as active in producing content as in consuming it). He is skeptical of some of the claims made about this cultural shift; specifically, he argues that the shift towards user-made content must be regarded as more reliant upon commercial media production than it is typically acknowledged to be. However, he regards web 2.0 as an exciting ongoing development for art and media production, citing its innovation and unpredictability.

The article is outdated in certain ways (it dates from 2009, before the launch of Instagram, to give just one example). Nevertheless, its critical engagement with the possibilities opened up for media production by the growth of social media is valuable in a general sense, and its conceptualization of these changes frequently applies just as well to more current social media platforms as it does to Myspace. Conceptually, I intend to draw on this article in my own analysis of the social dynamics of Twitter and Instagram.

Before you can write your annotations, you’ll need to find sources . If the annotated bibliography is part of the research process for a paper, your sources will be those you consult and cite as you prepare the paper. Otherwise, your assignment and your choice of topic will guide you in what kind of sources to look for.

Make sure that you’ve clearly defined your topic , and then consider what keywords are relevant to it, including variants of the terms. Use these keywords to search databases (e.g., Google Scholar ), using Boolean operators to refine your search.

Sources can include journal articles, books, and other source types , depending on the scope of the assignment. Read the abstracts or blurbs of the sources you find to see whether they’re relevant, and try exploring their bibliographies to discover more. If a particular source keeps showing up, it’s probably important.

Once you’ve selected an appropriate range of sources, read through them, taking notes that you can use to build up your annotations. You may even prefer to write your annotations as you go, while each source is fresh in your mind.

An annotated bibliography is an assignment where you collect sources on a specific topic and write an annotation for each source. An annotation is a short text that describes and sometimes evaluates the source.

Any credible sources on your topic can be included in an annotated bibliography . The exact sources you cover will vary depending on the assignment, but you should usually focus on collecting journal articles and scholarly books . When in doubt, utilize the CRAAP test !

Each annotation in an annotated bibliography is usually between 50 and 200 words long. Longer annotations may be divided into paragraphs .

The content of the annotation varies according to your assignment. An annotation can be descriptive, meaning it just describes the source objectively; evaluative, meaning it assesses its usefulness; or reflective, meaning it explains how the source will be used in your own research .

A source annotation in an annotated bibliography fulfills a similar purpose to an abstract : they’re both intended to summarize the approach and key points of a source.

However, an annotation may also evaluate the source , discussing the validity and effectiveness of its arguments. Even if your annotation is purely descriptive , you may have a different perspective on the source from the author and highlight different key points.

You should never just copy text from the abstract for your annotation, as doing so constitutes plagiarism .

Cite this Scribbr article

If you want to cite this source, you can copy and paste the citation or click the “Cite this Scribbr article” button to automatically add the citation to our free Citation Generator.

Caulfield, J. (2022, August 23). What Is an Annotated Bibliography? | Examples & Format. Scribbr. Retrieved February 27, 2023, from https://www.scribbr.com/citing-sources/annotated-bibliography/

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how to write an annotation

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Annotation Tips

Annotation, which means “to add notes,” is one of the key skills of active reading. By reading with a pen, pencil, or highlighter in hand, the reader can pause to mark important information, reflect on ideas, and monitor his or her understanding. This unit covers how to annotate different types of texts. It also covers how to make sense of visual aids, a common feature of many texts. Click on one of the areas below to learn more.

Write  |  Read  |  Educators

The contents of this web page were developed under grant #P116F150077 from the U.S. Department of Education. However, those contents do not necessarily represent the policy of the U.S. Department of Education, and you should not assume endorsement by the Federal Government.

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how to write an annotation

Learning Center

Annotating Texts

What is annotation.

Annotation can be:

Why annotate?

How do you annotate?

Summarize key points in your own words .

Circle key concepts and phrases

Write brief comments and questions in the margins

Use abbreviations and symbols

Highlight/underline

Use comment and highlight features built into pdfs, online/digital textbooks, or other apps and browser add-ons

What are the most important takeaways?

The table below demonstrates this process using a geography textbook excerpt (Press 2004):

A chart featuring a passage from a text in the left column and then columns that illustrate annotations that include too much writing, not enough writing, and a good balance of writing.

A common concern about annotating texts: It takes time!

Yes, it can, but that time isn’t lost—it’s invested.

Spending the time to annotate on the front end does two important things:

One last tip: Try separating the reading and annotating processes! Quickly read through a section of the text first, then go back and annotate.

Works consulted:

Nist, S., & Holschuh, J. (2000). Active learning: strategies for college success. Boston: Allyn and Bacon. 202-218.

Simpson, M., & Nist, S. (1990). Textbook annotation: An effective and efficient study strategy for college students. Journal of Reading, 34: 122-129.

Press, F. (2004). Understanding earth (4th ed). New York: W.H. Freeman. 208-210.

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COMMENTS

  1. How do I write an annotation for a source?

    Each annotation in an annotated bibliography is usually between 50 and 200 words long. Longer annotations may be divided into paragraphs. The content of the annotation varies according to your assignment. An annotation can be descriptive, meaning it just describes the source objectively; evaluative, meaning it assesses its usefulness; or reflective, …

  2. Annotated Bibliographies

    Writing an annotated bibliography can help you gain a good perspective on what is being said about your topic. By reading and responding to a variety of sources on a topic, you'll start to see what the issues are, what people are arguing about, and you'll then be able to develop your own point of view.

  3. Writing Annotations

    Writing Annotations. An annotation is a brief note following each citation listed on an annotated bibliography. The goal is to briefly summarize the source and/or explain why it is important for a topic. They are typically a single concise paragraph, but might be longer if you are summarizing and evaluating.

  4. Annotated Bibliography Samples

    Below you will find sample annotations from annotated bibliographies, each with a different research project. Remember that the annotations you include in your own bibliography should reflect your research project and/or the guidelines of your assignment. As mentioned elsewhere in this resource, depending on the purpose of your bibliography, some …

  5. How to Write an Annotated Bibliography

    To get started Choose your sources - Before writing your annotated bibliography, you must choose your sources. This involves doing... Review the items - Then review the actual items and choose those that provide a wide variety of perspectives on your... Write the citation and annotation - When ...

  6. Annotating a Journal Article

    Here are some other things you should do as you read and annotate the text: 6:59: paraphrase important information in the margins, such as the topic, hypothesis, model, and conclusion; 7:07: respond to ideas in the text by writing down your own thoughts and questions in the margins; 7:12: write down key terms in the margins; 7:16

  7. What Is an Annotated Bibliography?

    The annotation should be indented, double-spaced, and left-aligned. The first line of any additional paragraphs should be indented an additional time. How to write an annotated bibliography For each source, start by writing (or generating) a full reference entry that gives the author, title, date, and other information.

  8. Annotating

    Annotation, which means “to add notes,” is one of the key skills of active reading. By reading with a pen, pencil, or highlighter in hand, the reader can pause to mark important information, reflect on ideas, and monitor his or her understanding. This unit covers how to annotate different types of texts.

  9. Annotating Texts

    How do you annotate? Circle key concepts and phrases. What words would it be helpful to look-up at the end? What terms show up in lecture? Write brief comments and questions in the margins. Use abbreviations and symbols. Try * For anything that you might use as an example or evidence when you use ...

  10. Writing the annotation

    Writing a summary The first part of an annotation is usually a summary or description of the text. This involves briefly outlining the author’s main points, as well as providing an overview of the approach or methodology they have used. As you read each source, focus on understanding the main ideas.