Kotler, P., & Armstrong, G. (2001). The Kotler world of marketing tour (Principles of marketing). Prentice-Hall.
Cita Chicago (17th ed.)Kotler, Philip, i Gary Armstrong. The Kotler World of Marketing Tour (Principles of Marketing). Upper Saddle River, N.J: Prentice-Hall, 2001.
Cita MLA (9th ed.)Kotler, Philip, i Gary Armstrong. The Kotler World of Marketing Tour (Principles of Marketing). Prentice-Hall, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.