Author. Title of source. Title of container, Other contributors, Version, Number, Publisher, Publication date, Location.
There may be times when other people's contribution to the creation or identification of the source is important and needs to be acknowledged. For example, you may be studying a particular translation of a work, a particular adaptation of a play or a performance of a character. The source may be an edited collection of essays. To record another contributor, precede their name/s with the word that describes the role. Some common descriptions include:
e.g.
Beowulf. translated by Seamus Heaney, Faber and Faber, 2000, p. 17.
Waldorf, Sara. "A Turning Point in His Career: The Effect of the Hobbit on Middle-Earth." The Hobbit, edited by Stephen W. Potts, Salem / Grey House, 2016, pp. 145-159. Critical Insights EBSCOhost, search.ebscohost.com/login.aspx?direct=true&db=mzh&AN=2018580543&site=ehost-live.
If you cannot find an example for what you are looking for here, consult the MLA website, or the MLA Handbook (below)