Schoell W F <br/><br/>
Marketing: Contemporary concepts and practices 
Schoell W F; Guilti J P 
 - Ed 6th 
 - Englewood  Englewood, Prentice-Hall  1995 
 - 789p 
<br/><br/><label>ISBN: </label>0-205-15602-9 
<br/><br/><label>Source: </label>Textbook