Thomas, Wayne M.
The Sales manager's success manual
Amacom, 2008
 Buku Teks
Thomas, Wayne M.
The sales manager's success manual
Amacom, 2008
 eBooks
Sant, Tom
The giants of sales : what Dale Carnegie, John Patterson, Elmer Wheeler, and Joe Girard can teach you about real sales success
American Management Association, 2006
 eBooks
Farber, Barry J.
Success secrets of sales superstars : the moves and mayhem behind selling your way to the top as told by 34 industry leaders
Entrepreneur Press, 2013
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Leland, Karen
Customer service for dummies : a reference for the rest of us!/by karen leland & Keith Bailey
IDG Books Worldwide, 1996
 Buku Teks