Sinha, S.C. <br/><br/>
Research Methodology; Vol. 2. 

 - New Delhi:  EssEss Publications,  2002. 
 - 389p. 
<br/><br/><label>ISBN: </label>8170003342 
<br/><br/><label>Dewey Class. No.: </label>001.42  / SIN/R