Cita APA (7th ed.)
Kotler, P., & Armstrong, G. (1999). Principles of marketing (8th ed.). Prentice Hall.
Cita Chicago (17th ed.)
Kotler, Philip, i Gary Armstrong. Principles of Marketing. 8th ed. Upper Saddle River, NJ ; New Delhi: Prentice Hall, 1999.
Cita MLA (9th ed.)
Kotler, Philip, i Gary Armstrong. Principles of Marketing. 8th ed. Prentice Hall, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.