Dillon, W. R., Firtle, N. H., & Madden, T. J. (1993). Essentials of marketing research. Irwin.
Chicago Style aipamenaDillon, William R., Neil H. Firtle, and Thomas J. Madden. Essentials of Marketing Research. Homewood, Ill: Irwin, 1993.
MLA aipamenaDillon, William R., et al. Essentials of Marketing Research. Irwin, 1993.
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