Sugars, Bradley J.
Instant sales
McGraw-HIll , 2006
 Buku Teks SO
Johnson, Spencer
The one minute sales person
Harper Collins, 2004
 Buku Teks SO
Lapp, Charles L.
Successful selling strategies : how to climb the ladder to sales succes
McGraw-Hill, 1957
 Buku Teks SO
Ardyan Yudha
Analisis pengaruh sales encounters terhadap kesetiaan merek sepeda motor Honda = The impact of sales encounters on brand loyalty on Honda motorcycle
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2013
 UI - Skripsi Membership
Rodgers, Mark
Accelerate the sale : kick-start your personal selling style to close more sales, faster
McGraw-Hill , 2011
 Buku Teks SO