Armstrong, G., & Kotler, P. (1998). Marketing: An introduction (6th ed.). Canada: Prentice Hall.
Trích dẫn kiểu ChicagoArmstrong, Gary, và Philip Kotler. Marketing: An Introduction. 6th ed. Canada: Prentice Hall, 1998.
Deismireacht MLAArmstrong, Gary, và Philip Kotler. Marketing: An Introduction. 6th ed. Canada: Prentice Hall, 1998.
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