MLA Handbook Plus This link opens in a new windowThe go-to resource for writers of research papers and anyone citing sources is now available online through institutional subscriptions. MLA Handbook Plus includes the full text of the ninth edition of the handbook, the second edition of the MLA Guide to Digital Literacy, and the MLA Guide to Undergraduate Research in Literature, as well as a video course that teaches the principles of MLA documentation style through a series of short videos paired with quizzes, plus a final assessment.