Koul,Lokesh <br/><br/>
Methodology of educational research/ 
Lokesh Koul 
 - 4th edition 
 - New Delhi:  Vikas Publication House Pvt Ltd,  2009. 
 - 532 
<br/><br/><label>ISBN: </label>8125927964 
<br/><br/><label>Dewey Class. No.: </label>370.72  / KOU/M