Kothari, C. R. <br/><br/>
Research Methodology : Methods and Techniques 

 - New Delhi:  New Age International (P) Limited, Publisher,  2022. 
 - 458. 
<br/><br/><label>ISBN: </label>9789386649225 
<br/><br/><label>Dewey Class. No.: </label>370.78  / KOT