Duke University Libraries--Citing Sources and Avoiding Plagiarism http://www.lib.duke.edu/libguide/cite/works_cited.htm
Citation Machine http://citationmachine.net/
Noodletools Citation Express (MLA) http://www.noodletools.com
How to Write an A+ Research Paper http://www.aresearchguide.com/1steps.html
The Writing Lab at Purdue University The Purdue Online Writing Lab (OWL)
KnightCite http://www.calvin.edu/library/knightcite/index.php
EasyBib http://content.easybib.com/students/citation-guide/apa/