An annotated bibliography is a list of sources (books, articles, websites, etc.) with short paragraph about each source. An annotated bibliography is sometimes a useful step before drafting a research paper, or it can stand alone as an overview of the research available on a topic.
Each source in the annotated bibliography has a citation - the information a reader needs to find the original source, in a consistent format to make that easier. These consistent formats are called citation styles. The most common citation styles are MLA (Modern Language Association) for humanities, and APA (American Psychological Association) for social sciences.
Annotations are about 4 to 6 sentences long (roughly 150 words), and address:
The annotation above both summarizes and assesses the book in the citation. The first paragraph provides a brief summary of the author's project in the book, covering the main points of the work. The second paragraph points out the project’s strengths and evaluates its methods and presentation.