Raphael. Portrait of Tommaso Inghirami. 1511-12. oil on panel. Isabella Stewart Gardner Museum, Boston.
The OWL at Purdue is an excellent online resource to help you cite properly.
There are also a number of Free Citation Tools online.
Also, consider making an appoint ment at The Writing Center!
When it is time to gather all of your notes and start writing the paper, avoid the most common mistake - plagiarism. Plagiarism is not only taking large parts of someone else's work and not attributing credit to that author; paraphrasing sections of a work, even using synonyms and citing the work, is also plagiarism.
Even if the ideas are rewritten, the source of the idea must be cited and the author given credit.
For further information, see