This website suggests information sources for different disciplines, explains how to cite them in APA, Chicago, MLA and CSE, and provides example papers
APA Basics
Examples of the most commonly used APA citation styles--books and journals.
Reference Managers
Both of these reference managers are free, and both support ASA style.
A free reference manager and academic social network. Users can automatically generate bliographies, collaborate with other researchers online, import papers from other research software, find relevant papers, access papers from anywhere online, and read papers on the go with iPhone app.
Zotero is a free, open source utility that works in your browser to help users collect, manage and cite sources. It was developed at George Mason University. Highly recommended.