Marketing : An introduction 
Kotler, Philip. 
 - Third edition. 
 -  Prentice- Hall Inc.  1993 
 - 632 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>0-13-555244-3 
<br/><br/><label>Dewey Class. No.: </label>658.8 K874 1993