Sugars, Bradley J.
Instant sales
McGraw-Hill, 2006
 Buku Teks SO
Johnson, Spencer
The one minute sales person
HarperCollins, 2004
 Buku Teks SO
Gamble, Teri Kwal
Sales scripts that sell
American Society for Training & Development, 2007
 eBooks
Lapp, Charles L.
Successful selling strategies : how to climb the ladder to sales succes
McGraw-Hill, 1957
 Buku Teks SO
Rodgers, Mark
Accelerate the sale : kick-start your personal selling style to close more sales, faster
McGraw-Hill, 2011
 Buku Teks SO