Sellars III, David
Role playing the principles of selling/ David Sellars III
The Dryden Press, 1992
 Buku Teks
Buskirk, Richard Hobart, 1927-, author
Selling : principles and practices
McGraw-Hill, 1992
 Buku Teks
Nixon, H.K.
Principles of selling / by H. K. Nixon
McGraw-Hill, 1931
 Buku Teks
Allen, Peter, author
Selling
Pitman, 1998
 Buku Teks
Russell, Frederick A.
Selling : principles and practices / Frederic A. Russell, Frank H. Beach, Richard H. Buskirk
McGraw-Hill Publishing Company, 1988
 Buku Teks
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