Lambert, Brian, author
10 steps to successful sales
American Society for Training & Development, 2010
 eBooks
Jobber, David, author
Selling and sales management
Prentice-Hall, 2000
 Buku Teks
Thomas, Wayne M., author
The Sales manager's success manual
Amacom, 2008
 Buku Teks
Thomas, Wayne M., author
The sales manager's success manual
Amacom, 2008
 eBooks
Miller, William, author
Proactive sales management: how to lead, motivate, and stay ahead of the game
American Management Association, 2009
 eBooks
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