Trochim, William M K. <br/><br/>
Research methods 

 - 2nd ed. 
 - New Delhi  Biztantra  2003 
 - ix, 363 
<br/><br/><label>ISBN: </label>8177223720 
<br/><br/><label>Dewey Class. No.: </label>001.42  TRO;11