Kothari, C. R <br/><br/>
Research methodology  methods and techniques 

 - 2nd rev. ed 
 - 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