Phillips, C. F., & Duncan, D. J. (1968). Marketing: Principles and methods (6th ed.). Irwin.
Chicago Style aipamenaPhillips, Charles Franklin, and Delbert J. Duncan. Marketing: Principles and Methods. 6th ed. Homewood, Ill: Irwin, 1968.
MLA aipamenaPhillips, Charles Franklin, and Delbert J. Duncan. Marketing: Principles and Methods. 6th ed. Irwin, 1968.
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