Kothari C R <br/><br/>
Research methodology methods & technique 
Kothari C R 
 - Ed 2 
 - New Delhi  New Delhi, Wishwa Prakashan  1995 
 - 480p 
<br/><br/><label>ISBN: </label>81-7328-036-3 
<br/><br/><label>Source: </label>Textbook