Zikmund, W. G. (2013). Essentials of Marketing Research Fifth Edition. South-Western Cengage Learning.
Styl cytowania ChicagoZikmund, William G. Essentials of Marketing Research Fifth Edition. South-Western Cengage Learning, 2013.
Styl cytowania MLAZikmund, William G. Essentials of Marketing Research Fifth Edition. South-Western Cengage Learning, 2013.
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