Washington Post Writers Group. (1991). Messages: The Washington Post media companion. Allyn and Bacon.
Chicago-referens (17:e uppl.)Washington Post Writers Group. Messages: The Washington Post Media Companion. Boston: Allyn and Bacon, 1991.
MLA-referens (8:e uppl.)Washington Post Writers Group. Messages: The Washington Post Media Companion. Allyn and Bacon, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.