Berkowitz, E. N., Kerin, R. A., & Hartley, S. W. (1997). Marketing (5th ed.). Irwin.
Chicago Style aipamenaBerkowitz, Eric N., Roger A. Kerin, and Steven W. Hartley. Marketing. 5th ed. Chicago: Irwin, 1997.
MLA aipamenaBerkowitz, Eric N., et al. Marketing. 5th ed. Irwin, 1997.
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