Kotler, P. (1991). Principles of marketing (5th ed.). Prentice-Hall.
Chicago-čujuhus (17. p.)Kotler, Philip. Principles of Marketing. 5th ed. New Delhi: Prentice-Hall, 1991.
MLA-čujuhus (9. p.)Kotler, Philip. Principles of Marketing. 5th ed. Prentice-Hall, 1991.
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