APA (7th ed.) Zitazioa
(1997). Messages 4: The Washhington media companion. Allyn and Bacon.
Chicago Style (17th ed.) Zitazioa
Messages 4: The Washhington Media Companion. Boston: Allyn and Bacon, 1997.
MLA (9th ed.) Zitazioa
Messages 4: The Washhington Media Companion. Allyn and Bacon, 1997.
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