Remember to give credit to the original source when you use someone else's work or idea, whether you use a direct quote or paraphrase. Most style guides require some form of citation in the text of your paper as well as at the end in a bibliography or list of references.
Purdue Online Writing Center (OWL): The Purdue OWL offers detailed instructions and examples of how to write and cite in MLA or APA format.
Citation Machine: A free, quick, and easy to use citation generator that work for APA, Chicago, and MLA styles.
RefWorks: Use RefWorks to keep track of the articles you find as you do your library research, and use it again as you write to format your entire paper, inserting quotations and creating a list of references at the end.