To cite a textbook source in the MLA format, find the authors name(s), book title and the publisher's information. List the author's last name, then a comma, list the author's first name, then a comma and end with a period. Underline the book title followed by a period. List the city where the book was published followed by a colon and follow with the publishing house, a comma and end with a
. period. The MLA website is http://www.mla.org/style_faq1. More information is at http://citationmachine.net/index2.php?reqstyleid=1&mode=form&reqsrcid=MLABook&more=&nameCnt=1.