You have three great resources for getting helping with MLA Citation.
1) Purdue University OWL - Online Writing Lab
2) Easybib Citation Manager - register your account at school and then access premium features anywhere. Click on the Easybib tab for more information and tutorials.
3) Your librarian - just ask, stop by the library, send an email or tweet.
When you use information, either paraphrased or quoted you also need to make sure that you provide "in-text citations".
The Basics from Purdue Owl
Non-print sources (web)
Print sources (books, may include e-books if pages numbers are provided)
example - xxx the information you quoted/paraphrased xxx (Smith 263).
Smith 263 - is the author's last name and 263 stands for the page number. This will bring someone to the appropriate source in the works cited page.
If no known author exists use the shortened title.
Basic Formatting Requirements for Works Cited Page
1) Works Cited - center as title of page
2) one inch margins
3) doublespace
4) hanging indents
5) header