Walkup, Renee P.
Selling to anyone over the phone
American Management Association, 2006
 eBooks
Boyan, Lee
Successful cold call selling
American Management Association, 1989
 eBooks
Goldner, Paul S.
Red hot cold call selling
American Management Association;, 2006
 eBooks
Taylor, Jim
Selling to the new elite: discover the secret to winning over your wealthiest prospects
American Management Association;, 2011
 eBooks
Allen, Peter
Selling
Pitman, 1998
 Buku Teks