Kotler, P. (1980). Principles of marketing. New Jersey: Prentice-Hall.
Trích dẫn kiểu ChicagoKotler, Philip. Principles of Marketing. New Jersey: Prentice-Hall, 1980.
Deismireacht MLAKotler, Philip. Principles of Marketing. New Jersey: Prentice-Hall, 1980.
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