Beckwith, H. (2001). Selling the invisible: A field guide to modern marketing (1a edición.). New York: Texere.
Chicago Style CitationBeckwith, Harry. Selling the Invisible: A Field Guide to Modern Marketing. 1a edición. New York: Texere, 2001.
MLA CitationBeckwith, Harry. Selling the Invisible: A Field Guide to Modern Marketing. 1a edición. New York: Texere, 2001.
Warning: These citations may not always be 100% accurate.