Whiting, Percy H.
The five great rules of selling / Percy H. Whiting
Dale Carnegie & Associates, Inc., 1979
 Buku Teks
Manning, Gerald L., author
Selling today : building quality partnerships
Prentice Hall International, 1998
 Buku Teks
Kahn, George N.
36 kesalahan terbesar para penjual dan cara membetulkannya = The 36 biggest mistakes salesmen make and how to correct them / George N. Kahn; penerjemah, Yulia Sri Haryani
Gramedia Pustaka Utama, 1996
 Buku Teks
Sellars III, David
Role playing the principles of selling/ David Sellars III
The Dryden Press, 1992
 Buku Teks
Williams, Alan
All about selling / Alan Williams
McGraw-Hill, 1983
 Buku Teks
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