Author’s Last Name, First name. "Title of the Work, Chapter, Short Story or Essay." Title of the Anthology (in italics), edited by First Name, Last Name (s), edition if available (ex: 2nd ed.), Publisher, Year of Publication, Page Numbers of the chapter.
.
Last Name, First Name. "Title of Short Story." Title of the multivolume work (in italics), edited by First Name Last Name, volume number (vol.), Publisher, Year of Publication, Page numbers of the short story.
Example from the MLA Handbook:
Last Name, First Name, and First Name Last Name. Title of the Anthology (in italics). Publisher, Year of Publication.
Last Name, First Name and First Name Last Name. "Title of entry in the reference book." Title of the reference book or the encyclopedia (in italics), edited by First and Last Names, Edition number if given, Volume number if any, Publisher, Date of Publication, Pages of the entry.