Zikmund, W. G., & Babin, B. J. (2007). Essentials of marketing research (3rd ed.). Mason, OH: South-Western/Cengage Learning.
Παραπομπή Chicago StyleZikmund, William G., και Barry J. Babin. Essentials of Marketing Research. 3rd ed. Mason, OH: South-Western/Cengage Learning, 2007.
Παραπομπή MLAZikmund, William G., και Barry J. Babin. Essentials of Marketing Research. 3rd ed. Mason, OH: South-Western/Cengage Learning, 2007.
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