Option 1: Look at the CITING SOURCES RESEARCH GUIDE. Here you'll find links to resources on APA, Chicago/Turabian, MLA, and more.
Option 2: Use a tool like ZoteroBib or Zotero (see below).
Zotero is a free, open source citation management tool that works through web browsers Firefox, Chrome, or Safari. Zotero allows you to automatically import citations into your personal account, organize your sources into folders, and generate bibliographies in a variety of citation styles. It also includes a word processor plugin for formatting footnotes and parenthetical citations.
Visit www.zotero.org to download Zotero. You can choose to download (1) the Zotero Firefox extension "Zotero for Firefox" or (2) "Zotero Standalone," which works independently from your web browser.