Writing, Research, and Citation
This website from Cornell University has just about everything you need, to learn how to do effective research. It also covers how to identify what type of citation is needed for a document, and how to use it properly. One stop shopping.
This website has all of the tools that the Cornell website has, but it is much more user friendly. You could call it the "Readers Digest" version.
This website will create a proper citation for you. It covers the three most commonly used methods. 4 easy steps, and it's free.