APA (7th ed.) Zitazioa
Washington Post Writers Group. (1991). Messages: The Washington Post media companion. Allyn and Bacon.
Chicago Style (17th ed.) Zitazioa
Washington Post Writers Group. Messages: The Washington Post Media Companion. Boston: Allyn and Bacon, 1991.
MLA (9th ed.) Zitazioa
Washington Post Writers Group. Messages: The Washington Post Media Companion. Allyn and Bacon, 1991.
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