Cita APA (7th ed.)

Armstrong, G., & Kotler, P. (2009). Marketing: An introduction (9th ed.). Pearson/Prentice Hall.

Cita Chicago (17th ed.)

Armstrong, Gary, i Philip Kotler. Marketing: An Introduction. 9th ed. Upper Saddle River, NJ: Pearson/Prentice Hall, 2009.

Cita MLA (8th ed.)

Armstrong, Gary, i Philip Kotler. Marketing: An Introduction. 9th ed. Pearson/Prentice Hall, 2009.