Dillon, W. R., Firtle, N. H., & Madden, T. J. (1994). Marketing research, marketing environment. Illinois: Irwin.
Trích dẫn kiểu ChicagoDillon, William R., Neil H. Firtle, và Thomas J. Madden. Marketing Research, Marketing Environment. Illinois: Irwin, 1994.
Deismireacht MLADillon, William R., Neil H. Firtle, và Thomas J. Madden. Marketing Research, Marketing Environment. Illinois: Irwin, 1994.
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