Weitz, Barton A. <br/><br/>
Selling :  building partnerships / 
Barton A. Weitz, Stephen B. Castleberry, John F. Tanner, Jr. 
 - 5th ed. 
 - Boston :  McGraw-Hill/Irwin,  c2004. 
 - 1 v. (various pagings) :  col. ill. ;  27 cm.  1computer disc (4 3/4 in.) 
 - The Irwin/McGraw-Hill series in marketing .