APA (7th ed.) Zitazioa

Kotler, P. (1991). Principles of marketing (5th ed.). Prentice-Hall.

Chicago Style (17th ed.) Zitazioa

Kotler, Philip. Principles of Marketing. 5th ed. New Delhi: Prentice-Hall, 1991.

MLA (9th ed.) Zitazioa

Kotler, Philip. Principles of Marketing. 5th ed. Prentice-Hall, 1991.