An anthology is a collection of works on a common theme, often with different authors for the selections and usually with an editor for the entire volume.
Begin with the author of the selection or chapter, the year of publication, and the title of the selection or chapter.
Then write “In” and give the name(s) of the editor(s), followed by “Ed.” for one editor or “Eds.” for more than one in parentheses.
Give the title of the book and, in parentheses following the title, the page numbers on which the selection or chapter appears.