In brief
- An annotated bibliography is a list of citations, each followed by a short descriptive or evaluative paragraph called an annotation.
- Most annotations run about 100 to 200 words and combine summary, evaluation and relevance.
- In APA 7, entries are alphabetical with a hanging indent, and each annotation is block-indented 0.5 inch below its reference.
- Your instructor's instructions on length and annotation type take priority over general conventions.
What is an annotated bibliography? ¶
Write each annotation right after you read the source. It is much harder to reconstruct your judgment weeks later.
An annotated bibliography is a list of sources on a topic, each followed by a brief paragraph (the annotation) that describes the source and, usually, evaluates its quality and explains how it relates to your research. Each entry has two parts: a full citation in a style such as APA, and an annotation of roughly 100 to 200 words.
A plain reference list tells readers what you used. An annotated bibliography also tells them what each source says and why it matters. APA itself notes that a bibliography differs from a reference list because it may include descriptive notes, as in an annotated bibliography.
Instructors assign annotated bibliographies for three reasons: to check that you are reading widely, to make you read critically, and to prepare you for a literature review or research paper. Researchers also keep them privately as a reading log.
What to include in an annotated bibliography ¶
A complete annotation typically answers four questions. Your assignment may ask for only some of them.
- Citation: the full reference in the required style.
- Summary: What is the source's purpose, method and main finding or argument?
- Evaluation: How credible and useful is it? Consider the author's expertise, the study design, the sample, the date and any limitations or bias.
- Relevance (reflection): How does it fit your project? Does it support, challenge or extend other sources, and how will you use it?
If the bibliography is a standalone assignment, some instructors also ask for a short introduction stating your topic, the research question and how you chose sources.
Annotated bibliography introduction example
This annotated bibliography examines research on remote work and employee outcomes. Sources were located in PsycINFO and Business Source Complete using the terms telework, telecommuting and remote work, and were selected for their empirical evidence on performance and well-being.
Types of annotations ¶
There are three main kinds of annotation, and most assignments ask for a combination.
| Type | What it does | Example sentence |
|---|---|---|
| Descriptive (indicative) | Describes what the source covers without giving its findings. | "The authors review research on telecommuting and its outcomes for employees and organizations." |
| Summary (informative) | Reports the argument, method and main results. | "Working from home raised employee performance by 13% over 9 months." |
| Evaluative (critical) | Judges strengths, weaknesses and usefulness, and relates the source to others. | "Because the sample comes from a single firm with routine tasks, the findings may not generalize to collaborative knowledge work." |
When the instructions just say "annotated bibliography", write a combined annotation: two or three sentences of summary, one or two of evaluation, and one or two on relevance.
APA & Citation Formatting
Want your annotated bibliography checked against APA 7? We correct every entry and explain each change in Track Changes.
How to write an annotated bibliography ¶
- Find and select sources. Search scholarly databases and choose sources that address your question directly. Favor peer-reviewed research and recent work unless you need foundational texts.
- Cite each source correctly. Write the reference in the required style before you annotate, so nothing is lost. Check DOIs and capitalization rules.
- Read with the annotation in mind. Note the research question, design, sample, key findings and limitations.
- Draft the summary. In your own words, state the purpose, method and conclusion in two to four sentences.
- Add evaluation and relevance. Explain the source's strengths and weaknesses, then say how you will use it.
- Format and order the list. Arrange entries alphabetically by first author's surname and apply the formatting rules below.
Paraphrase rather than copying the abstract. Reusing abstract text without quotation marks is plagiarism, and it also skips the critical reading the assignment is designed to build.
APA annotated bibliography format (7th edition) ¶
APA 7 covers annotated bibliographies in Section 9.51 of the Publication Manual. Format the reference entries exactly as you would in a reference list, then add the annotation. The key rules:
- Order entries alphabetically by the first author's surname, as in a reference list.
- Format each reference with a 0.5-inch hanging indent.
- Start the annotation on a new line directly below its reference.
- Indent the whole annotation 0.5 inch from the left margin as a block, so it aligns with the hanging indent of the reference.
- If an annotation has more than one paragraph, indent the first line of each additional paragraph by a further 0.5 inch.
- Double-space everything, both references and annotations, with no extra blank lines between entries.
- Title the page "Annotated Bibliography" in bold, centered, unless your instructor specifies a different label.
- Use the usual APA paper settings: 1-inch margins, page numbers in the top right corner and a consistent font such as 12-point Times New Roman.
Instructors often adapt these rules, for example by setting a word limit or asking for single spacing. Their instructions override the general APA guidance.
Formatting details like hanging indents and DOI styling are easy to get wrong. Our APA formatting service checks every entry against APA 7 and explains each correction in a margin comment. For the wider rules, see our APA format guide.
Annotated Bibliography
Author, A. A., & Author, B. B. (Year). Title of article in sentence case. Journal Name in Title Case, Volume(Issue), page–page. https://doi.org/xxxxx
[Summary] This [study/review/article] examines [purpose] using [method and sample]. The authors found [main findings].
[Evaluation] The source is [credible/limited] because [design, sample, date, author expertise, bias].
[Relevance] This source [supports/challenges/extends] [other source or idea] and will help my project by [how you will use it].
Annotated bibliography example (APA 7) ¶
Below are three sample annotated bibliography entries on research articles about remote work. The sources are real; the annotations are written as a student would write them for a project on employee well-being. On your page, the annotation sits on the line under the reference, indented as a block.
Example entry 1
Allen, T. D., Golden, T. D., & Shockley, K. M. (2015). How effective is telecommuting? Assessing the status of our scientific findings. Psychological Science in the Public Interest, 16(2), 40–68. https://doi.org/10.1177/1529100615593273
Allen and colleagues review the research evidence on telecommuting, beginning with the problem that studies define and measure it inconsistently. They examine outcomes for employees, including job satisfaction, performance, work–family conflict and isolation, and conclude that effects are generally modest and depend on how extensively people telecommute. Written by established researchers in industrial-organizational psychology, the review is balanced and clearly organized, although it predates the shift to remote work after 2020. It provides the definitions and conceptual framework for my paper.
Example entry 2
Bloom, N., Liang, J., Roberts, J., & Ying, Z. J. (2015). Does working from home work? Evidence from a Chinese experiment. The Quarterly Journal of Economics, 130(1), 165–218. https://doi.org/10.1093/qje/qju032
This field experiment randomly assigned volunteer call-center employees at a large Chinese travel agency to work from home or in the office for 9 months. Home workers' performance rose by 13%, mainly because they worked more minutes per shift, and attrition fell by about half. The randomized design gives unusually strong causal evidence. However, the sample comes from a single firm with routine, individually measured tasks, so the results may not generalize to collaborative knowledge work. I use this study as the strongest evidence for performance benefits and contrast it with Golden et al. (2008).
Example entry 3
Golden, T. D., Veiga, J. F., & Dino, R. N. (2008). The impact of professional isolation on teleworker job performance and turnover intentions: Does time spent teleworking, interacting face-to-face, or having access to communication-enhancing technology matter? Journal of Applied Psychology, 93(6), 1412–1421. https://doi.org/10.1037/a0012722
Golden and colleagues surveyed professional teleworkers to test how feelings of professional isolation relate to job performance and turnover intentions. Isolation was associated with lower performance and, unexpectedly, with lower turnover intentions. The negative link with performance was stronger for employees who teleworked more and weaker for those with more face-to-face contact or better communication technology. The cross-sectional design limits causal claims, but the moderators are directly relevant to my question about hybrid schedules.
Annotated bibliography vs literature review ¶
The two are related but different. An annotated bibliography treats each source separately; a literature review weaves the same sources into an argument organized by themes. The annotated bibliography is often a stepping stone: once your annotations are written, the evaluation and relevance sentences show you which themes and gaps to build the review around.
| Feature | Annotated bibliography | Literature review |
|---|---|---|
| Unit of organization | One source per entry | Themes, debates or methods |
| Order | Alphabetical | Logical argument |
| Purpose | Show and assess what you read | Synthesize research and identify a gap |
When you are ready to make the move, our guide on how to write a literature review explains synthesis step by step.
Common mistakes to avoid ¶
- Copying or lightly rewording the abstract. An annotation must be your own summary and judgment.
- Summary only. If the assignment asks for evaluation, a purely descriptive paragraph will lose marks. Add at least one sentence on strengths or limitations.
- Vague relevance. "This source is useful for my research" says nothing. Name the specific question, chapter or argument it supports.
- Inconsistent citations. Mixing styles, missing DOIs and title-case article titles are the most frequent APA errors in student bibliographies.
- Wrong indentation. The reference takes a hanging indent; the annotation is indented as a whole block beneath it.
For more on reference entries and citing within your text, see our guide to APA in-text citations. Before you submit edited work, check your institution's academic integrity rules on outside help.