Kotler, P., & Armstrong, G. (1997). Marketing: An introduction (4th ed.). Prentice Hall.
Tohutoru Kātū Chicago (17th ed.)Kotler, Philip, me Gary Armstrong. Marketing: An Introduction. 4th ed. New Jersey: Prentice Hall, 1997.
Tohutoro MLA (9th ed.)Kotler, Philip, me Gary Armstrong. Marketing: An Introduction. 4th ed. Prentice Hall, 1997.
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