A bibliography is a list of all sources used in an assignment, organized alphabetically by author's last name. If no author is listed, sources are organized alphabetically by title. The bibliography includes full details of books, book chapters, journal articles, newspaper articles, encyclopedia articles, audiovisual materials, webpages, and personal communications. Personal communications are not included in the bibliography but referenced in-text. The document provides examples of how to format different source types in a bibliography using APA referencing style.