For a paper this length you should have 3
sources. Three sources must be
critical, from a collection of essays or an article in a refereed journal. A refereed journal is a journal that
specializes in the topic where the paper has been sent to at least three of the
author’s peers and then published. Do
not use Wikipedia as a source. You may
use it as a means to obtain a clear and precise idea of you topic. Sometimes Wikipedia will give you a link to a
credible source that you may be able to use.