The document provides an overview of various style guides used for different types of writing. It lists the Associated Press (AP) style guide used primarily for journalism, the Modern Language Association (MLA) style for literature and humanities, the American Psychological Association (APA) style for social sciences, and the Chicago Manual of Style (CMS) used for book publishing. It also briefly describes the Turabian, American Medical Association (AMA), and National Library of Medicine (NLM) style guides used for research and medical/health fields respectively.