Shonka, Mark <br/><br/>
Beyond selling value  a proven process to avoid the vendor trap 
Mark Shonka, Dan Kosch. 
 - Chicago  Dearborn Trade Books  2002 
 - xvi, 283p., 23cm. 
<br/><br/><label>ISBN: </label>0-7931-5470-7. 
<br/><br/><label>Dewey Class. No.: </label>658.81  / S41B