The Associated Press Stylebook, usually called the AP Stylebook, is a style and usage guide used by newspapers and journalists in the news industry. The book is updated annually by the Associated Press. Reporters, editors and others use the AP Stylebook as a guide for grammar, punctuation and principles and practices of reporting. Although some publications use a different style guide, the AP Stylebook ’is considered a newspaper industry standard and is also used by broadcasters, magazines and public relations firms. It includes an A-to-Z listing of guides to capitalization, abbreviation, spelling, numerals and usage information.

The MLA Style Manual and Guide to Scholarly Publishing (2008) is the third edition of The MLA Style Manual, first published by the Modern Language Association of America in 1985. It is an academic style guide widely used in the United States, Canada and other countries, providing guidelines for writing and documentation of research in the humanities, especially in English studies, the study of other modern languages and literatures, including comparative literature; literary criticism, media studies, cultural studies and related disciplines. It has been described as the standard for graduate students, scholars and professional writers. The MLA guidelines are also used by scholarly and literary journals, newsletters and magazines and by many university and commercial presses. The style features brief parenthetical citations in the test keyed to an alphabetical list of works cited that appears at the end of the work.

A Manual for Writers of Research Papers, These and Dissertations is published by the University of Chicago Press and is often referred to simply as Turabian. It is a style guide for writing and formatting research papers such as the arrangement and punctuation of footnotes and bibliographies. The style described in this book is commonly known as Turabian Style. The 7th edition was published on April 15, 2007 (U.S.) and May 10, 2007 (UK) and has undergone regular and extensive revisions including guidance on citing electronic sources. Turabian’s manual sold more than seven million copies since it was first published in 1937. Turabian style is named after the book's original author Kate L. Turabian, who developed it for the University of Chicago. The Turabian Citation Guide is a guide for understanding the Turabian style.