AP Stylebook editors refer to the following resources to help guide style decisions. If you do not find your answer in the Stylebook, try checking one of these other sources. You can buy them for yourself using the links below.

First reference for spelling, style, usage and foreign geographic names:


Other references for spelling, style, usage and foreign geographic names:

American Heritage Dictionary of the English Language, Fifth Edition

Concise Oxford English Dictionary: Main edition 12th edition by Oxford Dictionaries (2011) Hardcover

Webster's Third New International Dictionary of the English Language

National Geographic Atlas of the World, Tenth Edition

The Elements of Style, Fourth Edition

The Chicago Manual of Style, 17th Edition

For aircraft names:

IHS Jane's All the World's Aircraft 2014-2015: Development & Production

For military ships:

Jane's Fighting Ships 2016/2017: Yearbook

For nonmilitary ships:


For railroads:

The Official Railway Guide: Freight Service Edition,The Bulk Connection March/April 1990

For federal government questions:

Congress At Your Fingertips 115th Congress 1st Session 2017

For non-U.S. government questions:

Political Handbook of the World

The CIA World Factbook 2017

For religion questions:

Handbook of Denominations in the United States 13th Edition

Other references and writing guides consulted in the preparation of the AP Stylebook:

The Careful Writer

More Language That Needs Watching

Watch Your Language: a Lively, Informal Guide to Better Writing Emanating from the News Room of the New York Times

THE WORD: An Associated Press Guide To Good News Writing

Modern American Usage: A Guide

A Dictionary of Modern English Usage, Second Edition

Fowler's Dictionary of Modern English Usage

Harper Dictionary of Contemporary Usage

Newton's Telecom Dictionary

Dictionary of Problem Words and Expressions

Words into Type

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