Kothari, C. R. <br/><br/>
Research Methodology  : Methods and Techniques 
/ by C. R. Kothari 
 - 5th ed.; 
 - London:  New Age International (P) Ltd.,  1985. 
 - xix, 464p.; 
<br/><br/><label>ISBN: </label>9789389802559 
<br/><br/><label>Dewey Class. No.: </label>001.42  / KOT/R