Geller, L. K. (2002). Response: The complete guide to profitable direct marketing (Revised and Expanded.). Oxford University Press.
Chicago-viite (17. p.)Geller, Lois K. Response: The Complete Guide to Profitable Direct Marketing. Revised and Expanded. New York, New York: Oxford University Press, 2002.
MLA-viite (9. p.)Geller, Lois K. Response: The Complete Guide to Profitable Direct Marketing. Revised and Expanded. Oxford University Press, 2002.
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