AP Stylebook
The Associated Press Stylebook (generally called the AP Stylebook), alternatively titled The Associated Press Stylebook and Briefing on Media Law, is a style and usage guide for American English grammar created by American journalists working for or connected with the Associated Press journalism cooperative based in New York City. The Stylebook offers a basic reference to American English grammar, punctuation, and principles of reporting, including many definitions and rules for usage as well as styles for capitalization, abbreviation, spelling, and numerals.