WRENN BRUCE. (2002). MARKETING RESEARCH: TEXT AND CASES. JAICO PUBLISHING HOUSE.
Lua i Stíl Chicago (17ú heag.)WRENN BRUCE. MARKETING RESEARCH: TEXT AND CASES. MUMBAI: JAICO PUBLISHING HOUSE, 2002.
Lua MLA (9ú heag.)WRENN BRUCE. MARKETING RESEARCH: TEXT AND CASES. JAICO PUBLISHING HOUSE, 2002.
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