ZIKMUND WILLIAM G. (1986). TEST BANK MARKETING (2ND.). JOHN WILEY AND SONS.
Lua i Stíl Chicago (17ú heag.)ZIKMUND WILLIAM G. TEST BANK MARKETING. 2ND. JOHN WILEY AND SONS, 1986.
Lua MLA (9ú heag.)ZIKMUND WILLIAM G. TEST BANK MARKETING. 2ND. JOHN WILEY AND SONS, 1986.
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