Armstrong, G., & Kotler, P. (2013). Marketing: An introduction (11th ed.). US: Prentice Hall. (TSDAS Digital Library: HF5415 Arm [6th ed.])

Kotler, P., & Amstrong, G. (2013). Principles of marketing (15th ed.). US: Prentice Hall. (TSDAS Digital Library: HF5415 Kot [11th ed.])

Solomon, M. R., & Stuart, E. W.(2011). Marketing: Real people real choice (7th ed.). US: Prentice Hall.