Duncan, G. (2001). Streetwise direct marketing: How to use the Internet, direct mail, and other media to generate direct sales. Adams Media Corp.
Dyfyniad Arddull ChicagoDuncan, George. Streetwise Direct Marketing: How to Use the Internet, Direct Mail, and Other Media to Generate Direct Sales. Holbrook, Mass: Adams Media Corp, 2001.
Dyfyniad MLADuncan, George. Streetwise Direct Marketing: How to Use the Internet, Direct Mail, and Other Media to Generate Direct Sales. Adams Media Corp, 2001.
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