Aaker, D. A., Kumar, V., & Day, G. S. (1998). Marketing research (6th ed.). Wiley.
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Dyfyniad Arddull Chicago
Aaker, David A., V. Kumar, and George S. Day. Marketing Research. 6th ed. New York: Wiley, 1998.
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Dyfyniad MLA
Aaker, David A., et al. Marketing Research. 6th ed. Wiley, 1998.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.