Cita APA

Kotler, P., & Armstrong, G. (2001). Principles of marketing (9th ed.). Upper Saddle River: Prentice Hall.

Chicago Style Citation

Kotler, Philip, i Gary Armstrong. Principles of Marketing. 9th ed. Upper Saddle River: Prentice Hall, 2001.

Cita MLA

Kotler, Philip, i Gary Armstrong. Principles of Marketing. 9th ed. Upper Saddle River: Prentice Hall, 2001.