Kotler, P., Armstrong, G., & Franke, G. (1989). Principles of marketing (4th ed., annotated instructor's ed.). Prentice Hall.
Chicago-viite (17. p.)Kotler, Philip, Gary Armstrong, ja George Franke. Principles of Marketing. 4th ed., annotated instructor's ed. Englewood Cliffs, N.J: Prentice Hall, 1989.
MLA-viite (9. p.)Kotler, Philip, et al. Principles of Marketing. 4th ed., annotated instructor's ed. Prentice Hall, 1989.
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