Weits, Barton A.
Selling : building partnerships
McGraw-Hill Irwin, 2001
Buku Teks
Allen, Peter
Selling
Pitman, 1998
Buku Teks
Wingate, John W.
Fundamentals of selling
South-Western Publishing, 1959
Buku Teks
Allen, Robert Y.
Selling dynamics
McGraw-Hill, 1984
Buku Teks
Sutton, Kelso
The technique of selling
McGraw-Hill, 1949
Buku Teks