To Cite Sources in MLA or APA Format, I suggest.: Citation Machine
Many students also use this site: EasyBib
Neither of these sites should take the place of a basic understanding of citing sources, especially if you are taking the Advanced Placement English and Composition exam. You need to know the basics by memory.
The Montrose Public Library: Young Adult web page has many excellent resources for research. You will need a Library Card for access to some of the databases.Research Resources from the Montrose Library Young Adult web site
For the Pros and Cons or Opposing Sides to Current Topics: ProCon.org
If you have a question or need a quality resource to check your work, I always refer to this web site:The Purdue Online Writing Lab (OWL)
The Purdue OWL. Purdue U Writing Lab, 2010. Web. 02.10. 2013.