Kothari, C.R <br/><br/>
Research methodology : methods and techniques .-2nd rev ed .-978-81-224-1522-3 

 - New age international, New Delhi  2004 
 - xvi,401 
<br/><br/><label>ISBN: </label>978-81-224-1522-3 
<br/><br/><label>Dewey Class. No.: </label>307.2 Kot