PRIDE WILLIAM M. (1989). MARKETING: CONCEPTS AND STRATEGIES (6TH.). HOUGHTON & MIFFLIN.
Lua i Stíl Chicago (17ú heag.)PRIDE WILLIAM M. MARKETING: CONCEPTS AND STRATEGIES. 6TH. BOSTON: HOUGHTON & MIFFLIN, 1989.
Lua MLA (9ú heag.)PRIDE WILLIAM M. MARKETING: CONCEPTS AND STRATEGIES. 6TH. HOUGHTON & MIFFLIN, 1989.
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