McDonal, W. J. (1998). Direct marketing: An integrated approach. Boston: Irwin.
Trích dẫn kiểu ChicagoMcDonal, Wiliam J. Direct Marketing: An Integrated Approach. Boston: Irwin, 1998.
MLA citiranjeMcDonal, Wiliam J. Direct Marketing: An Integrated Approach. Boston: Irwin, 1998.
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