Professional selling  a trust based approach 
Thomas N. Ingram . [et al]. 
 - FortWorth  Harcourt College  2001 
 - xxiii, 280p., 28cm. 
<br/><br/><label>ISBN: </label>0-03-026701-3. 
<br/><br/><label>Dewey Class. No.: </label>658.85  / P87P