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

 - 2nd ed 
 - New Delhi  Wiley Eastern  1990 
 - xii, 468 p.   
<br/><br/>  First edition 1985 
<br/><br/><label>ISBN: </label>0-8-5226-4771 
<br/><br/><label>ISSN: </label>
<br/><br/><label>Subjects--Index Terms: </label>Research Methodology 
<br/><br/><label>Dewey Class. No.: </label>001.8