Research Methodology/ 
Panneerselvam ,R. 
 - 2nd Revised edition 
 - New Delhi:  Prentice-Hall of India Pvt.Ltd,  2014. 
 - 699 
<br/><br/><label>ISBN: </label>9788120349469 
<br/><br/><label>Dewey Class. No.: </label>001.42  / PAN/R