Relied on by generations of writers, the MLA Handbook is published by the Modern Language Association and is the only official, authorized book on MLA style. The new, ninth edition builds on the MLA's unique approach to documenting sources using a template of core elements--facts, common to most sources, like author, title, and publication date--that allows writers to cite any type of work, from books, e-books, and journal articles in databases to song lyrics, online images, social media posts, dissertations, and more.

Technologies may change, but the need for clear and accurate communication never goes out of style. That is why for more than one hundred years The Chicago Manual of Style has remained the definitive guide for anyone who works with words.

The Publication Manual of the American Psychological Association, Seventh Edition is the official source for APA Style. With millions of copies sold worldwide in multiple languages, it is the style manual of choice for writers, researchers, editors, students, and educators in the social and behavioral sciences, natural sciences, nursing, communications, education, business, engineering, and other fields.