Zikmund, W. G., & Babin, B. J. (2007). Exploring marketing research (9th ed.). Thomson/South-Western.
Lua i Stíl Chicago (17ú heag.)Zikmund, William G., agus Barry J. Babin. Exploring Marketing Research. 9th ed. Mason, OH: Thomson/South-Western, 2007.
Lua MLA (9ú heag.)Zikmund, William G., agus Barry J. Babin. Exploring Marketing Research. 9th ed. Thomson/South-Western, 2007.
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