APA (7th ed.) Zitazioa

Howard, J. A. (1965). Marketing theory. Allyn and Bacon.

Chicago Style (17th ed.) Zitazioa

Howard, John A. Marketing Theory. Boston: Allyn and Bacon, 1965.

MLA (9th ed.) Zitazioa

Howard, John A. Marketing Theory. Allyn and Bacon, 1965.