Weits, Barton A.
Selling : building partnerships
Irwin, McGraw-Hill, 2001
 Buku Teks SO
Allen, Peter
Selling
Pitman, 1998
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Wingate, John W.
Fundamentals of selling
South-Western Publishing, 1959
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Kurtz, David L.
Professional selling
Business Publications, 1982
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Sutton, Kelso
The technique of selling
McGraw-Hill, 1949
 Buku Teks SO