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Sometimes referred to as Turabian Style, this style guide is preferred by most book publishers in both fiction and nonfiction. Not generally used for scholarly publications, it is occasionally seen in academic writings in the history disciplines. 

Developed for news communication and journalism, AP style minimizes unnecessary stylization and favors concision over voice. 

The styling standard for the social sciences—including psychology, sociology, education, and politics—APA style is sometimes used for engineering and business writing as well.

A predominant academic style guide, MLA is the standard in literary analysis and the humanities.