HOFFMAN K DOUGLAS. (2002). ESSENTIALS OF SERVICES MARKETING: CONCEPTS, STRATEGIES AND CASES (2ND.). THOMSON LEARNING.
Lua i Stíl Chicago (17ú heag.)HOFFMAN K DOUGLAS. ESSENTIALS OF SERVICES MARKETING: CONCEPTS, STRATEGIES AND CASES. 2ND. AUSTRALIA: THOMSON LEARNING, 2002.
Lua MLA (9ú heag.)HOFFMAN K DOUGLAS. ESSENTIALS OF SERVICES MARKETING: CONCEPTS, STRATEGIES AND CASES. 2ND. THOMSON LEARNING, 2002.
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