In general, works cited lists are arranged alphabetically by the author's last name. If the author is unknown, entries are alphabetized by the first word in their titles (note, however, to drop A, An, or The).
To create a proper MLA works cited list when there are multiple sources by the same author, place the references in alphabetical order by the title. Only include the author's name in the first reference. In place of the author's name, place three dashes, followed by a comma.
