FERRELL O C. (1989). MARKETING CONCEPTS AND STRATEGIES (6TH.). HOUGHTON & MIFFLIN.
Chicago-čujuhus (17. p.)FERRELL O C. MARKETING CONCEPTS AND STRATEGIES. 6TH. BOSTON: HOUGHTON & MIFFLIN, 1989.
MLA-čujuhus (9. p.)FERRELL O C. MARKETING CONCEPTS AND STRATEGIES. 6TH. HOUGHTON & MIFFLIN, 1989.
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