MLA Handbook by 
A Pocket Style Manual by 
The Rowman and Littlefield Guide to Writing with Sources by 
Rules for Writers by Many online periodical indexes show you exactly how to cite the sources you find. Look for a link that says something like "citation tools," or "cite this article." Click on that link, and you will see the citation in various formats. Note: you are ultimately responsible for making sure your citations are correct. Make sure that your indentations and spacing are correct.
This MLA web resource contains specific information on formatting a research paper and creating a Works Cited page.
