The ninth edition of the MLA Handbook simplifies and clarifies the terminology used to describe some of the elements of a works-cited-list entry. Thus, the element name Other Contributors, used in the previous edition, has been shortened to Contributor. The definition of the element remains the same: a contributor is a person who had a hand in creating the work but is not its primary author. The change in terminology helps clarify that works without a primary author (like an anonymously written work) can have a contributor (like an editor or translator). 

Sections 5.38–5.41 of the MLA Handbook, ninth edition, explain the Contributor element in detail.