Chopra,P.N. <br/><br/>
Business economics 

 - 2014 reprint. 
 - New Delhi:  Kalyani publishers. 
 - 309. 
<br/><br/><label>ISBN: </label>978-93-272-1727-8 
<br/><br/><label>Dewey Class. No.: </label> / CHO