Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share your research sources. Plugins for Word and Google Docs help you quickly insert footnotes or in-text citations.
The AP Stylebook is a must-have reference for writers, editors, students and professionals. It provides fundamental guidelines for spelling, language, punctuation, usage and journalistic style.
Purdue University's Online Writing Lab (OWL) website provides information on many writing styles, including AP. This page provides a brief introduction to AP Style, standard style guidelines, lists of frequently used abbreviations, suggestions for writing leads, & more.