Shinn, George
Introduction to professional selling / George Shinn
Gregg Division, McGraw-Hill, 1982
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Nixon, H.K.
Principles of selling / by H. K. Nixon
McGraw-Hill, 1931
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Sellars III, David
Role playing the principles of selling/ David Sellars III
The Dryden Press, 1992
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Whiting, Percy H.
The five great rules of selling / Percy H. Whiting
Dale Carnegie & Associates, Inc., 1979
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Allen, Robert Y.
Selling dynamics / Robert Y. Allen, Robert F. Spohn, I. Herbert Wilson
McGraw-Hill, 1984
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