Armstrong, G., & Kotler, P. (2011). Marketing: An introduction (10th ed.). Prentice Hall.
Cita Chicago (17th ed.)Armstrong, Gary, i Philip Kotler. Marketing: An Introduction. 10th ed. Boston, Mass: Prentice Hall, 2011.
Cita MLA (9th ed.)Armstrong, Gary, i Philip Kotler. Marketing: An Introduction. 10th ed. Prentice Hall, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.