Battersby, Albert
Sales forecasting
Penguin Books, 1968
 Buku Teks
Sugars, Bradley J.
Instant sales
McGraw-HIll , 2006
 Buku Teks
Jones, John G.
Sales management
Alexander Hamilton Institute, 1961
 Buku Teks
Storholm, Gordon R.
Sales management
Prentice-Hall, 1982
 Buku Teks
Still, Richard R.
Sales management
Prentice Hall International, 1988
 Buku Teks