Aaker, D. A., Day, G. S., & Kumar, V. (2001). Marketing research (7th ed.). New York: Wiley.
Trích dẫn kiểu ChicagoAaker, David A., George S. Day, và V. Kumar. Marketing Research. 7th ed. New York: Wiley, 2001.
Deismireacht MLAAaker, David A., George S. Day, và V. Kumar. Marketing Research. 7th ed. New York: Wiley, 2001.
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