In a previous Blog post I discussed Cite this for Me: Web Citer, a Google Extension. Another options to help with creating a bibliography would be EasyBib!
EasyBib is a Google Docs add-on that allows you to create a bibliography, automatically. You can cite books, journal articles and websites simply by entering the title or URL.
This add-on lets you format in MLA, APA, Chicago, Harvard, and over 7K other styles. When you have finished adding your sources, EasyBib will generate your bibliography, alphabetize your citations and add them to the end of your paper, with just a couple of mouse clicks.
Select Manage Bibliography from the drop-down and begin filling in the information in the sidebar.