Google has created a citation tool within Google Docs that does most of the work for you.
Click on the link above to view a screencast on how to use Google's citation tool.
Start a separate page at the end of your document
Label it Works Cited, centered at the top of the page
1 inch margins all around
Times New Roman, 12 point font
Double spaced throughout the page
Indent all but the first line of each citation by .5 to create a hanging indent.
This is a great resource packed with information and examples about citing all your sources. Includes both MLA and APA styles.