Maddala G S <br/><br/>
Microeconomics : Theory and applications 
Maddala G S; Miller E 
 - N  N, D Tata McGraw- Hill  1989 
 - 634p 
<br/><br/><label>ISBN: </label>0-07-059055-9 
<br/><br/><label>Source: </label>Textbook