Beckwith, H. (1997). Selling The Invisible: A Field Guide to Modern Marketing. Warner Books.
Chicago Style (17th ed.) CitationBeckwith, Harry. Selling The Invisible: A Field Guide to Modern Marketing. Warner Books, 1997.
MLA (8th ed.) CitationBeckwith, Harry. Selling The Invisible: A Field Guide to Modern Marketing. Warner Books, 1997.
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