An annotated bibliography is an organized list of sources with a brief description or annotation for each source. The purpose is to provide a review of the literature on a topic and illustrate the quality of research done. Annotations typically describe the content and usefulness of the source, any limitations, intended audience, research methods used, and a reaction. Annotations follow bibliographic entries in a consistent style such as MLA and are usually arranged alphabetically by author's last name. Annotations are brief but include significant details about each source.