Q. How can I create an MLA citation for a book I found in Google Books?

You can use an automatic citation generator website and enter the bibliographic information of the Google book to have the site create the citation for you.  There are links to automatic citation generators in the Cite MLA Style guide linked below, on the left under Citation Generators.  You can get the bibliographic information of the Google book while you have it open in Google, by clicking on the About This Book link and scrolling to the bottom of the page for the heading Bibliographic Information.

For more information on doing MLA citations, see the Cite MLA Style guide linked below.