Bly, R. W., & Robert W. Bly. (2006). The: How to generate more leads and sales by offering your customers free white papers, special reports, booklets, and CDs. New york,Mason, Ohio: Thomson,American Marketing Association.
Dyfyniad Arddull ChicagoBly, Robert W., và Robert W. Bly. The: How to Generate More Leads and Sales By Offering Your Customers Free White Papers, Special Reports, Booklets, and CDs. New york,Mason, Ohio: Thomson,American Marketing Association, 2006.
Dyfyniad MLABly, Robert W., và Robert W. Bly. The: How to Generate More Leads and Sales By Offering Your Customers Free White Papers, Special Reports, Booklets, and CDs. New york,Mason, Ohio: Thomson,American Marketing Association, 2006.
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