Marks, Ronald B. <br/><br/>
Professional selling :  an interactive approach / 
Ronald B. Marks. 
 - fourth edition. 
 - xix, 604 pages. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0-205-12784-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Selling.<br/>Selling--Psychological aspects.<br/>Selling--Vocational guidance.