Software
The following comparable products can be reviewed for your citation needs:
Citation 9 (from the vendor directly)
http://citationonline.net/9-home.asp
Refworks
http://www.refworks.com/
EndNote
http://endnote.com/
NoodleBib
http://www.noodletools.com/
Online Resources
Internet Public Library ~
http://www.ipl.org/div/farq/netciteFARQ.html
Research and Documentation Online
http://www.dianahacker.com/resdoc/
MLA Style
http://www.mla.org/main_stl.htm
Electronic Reference Formats Recommended
by the American Psychological Association (APA)
http://www.apastyle.org/elecref.html
OWL at Purdue (APA Formatting and Style Guide)http://owl.english.purdue.edu/owl/resource/560/01/