Kurtz, David L.
Professional selling
Business Publications, 1982
 Buku Teks
Shinn, George
Introduction to professional selling
McGraw-Hill, 1982
 Buku Teks
Eccher, Clint
Professional web design : techniques and templates
Charles River Media, 2002
 Buku Teks
Bacon, Terry R., 1947-
Selling to major accounts: tools, techniques, and practical solutions for the sales manager
[American Management Association;, ], 1999
 eBooks
Allen, Peter
Selling
Pitman, 1998
 Buku Teks