Buskirk, Richard Hobart, 1927-
Selling : principles and practices
McGraw-Hill, 1992
 Buku Teks SO
Hobbs, Thomas
Shocking beauty
Periplus, 1999
 Buku Referensi
Hickey, Gerald Connon
Village in Vietnam/Geral Cannon Hickey
Yale University Press, 1967
 Buku Teks SO
Leinwand, Gerald
The pageant of world history / Gerald Leinwand
Allynand Bacon, Inc., 1974
 Buku Teks SO
Allen, Peter
Selling
Pitman, 1998
 Buku Teks SO