Kotler, P. (1984). Marketing essentials. Prentice-Hall.
Tohutoru Kātū Chicago (17th ed.)Kotler, Philip. Marketing Essentials. .Englewood Cliffs, N.J: Prentice-Hall, 1984.
Tohutoro MLA (9th ed.)Kotler, Philip. Marketing Essentials. Prentice-Hall, 1984.
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