Enis, Ben M. <br/><br/>
Marketing principles. 

 - 3d ed. 
 - Santa Monica, Calif. :  Goodyear Pub. Co.,  1980. 
 - xxiii, 647 p. 
<br/><br/><label>ISBN: </label>0830254846 
<br/><br/><label>Dewey Class. No.: </label>658.8  / ENI