Kotler, P., & Armstrong, G. (1997). Marketing: An introduction (Fourth edition.). Prentice Hall International.
Cita Chicago (17th ed.)Kotler, Philip, i Gary Armstrong. Marketing: An Introduction. Fourth edition. Upper Saddle River, New Jersey: Prentice Hall International, 1997.
Cita MLA (9th ed.)Kotler, Philip, i Gary Armstrong. Marketing: An Introduction. Fourth edition. Prentice Hall International, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.