Kotler, P. (1994). Learning guide ; Principles of marketing (6th ed.). Prentice Hall.
Chicago-viite (17. p.)Kotler, Philip. Learning Guide ; Principles of Marketing. 6th ed. New Jersey, New York: Prentice Hall, 1994.
MLA-viite (9. p.)Kotler, Philip. Learning Guide ; Principles of Marketing. 6th ed. Prentice Hall, 1994.
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