Trochim, William M <br/><br/>
Research methods :  the essential knowledge base 

 - Australia,  Cengage,  2022. 
 - xxii, 422 p. 
<br/><br/><label>ISBN: </label>9788131530856 
<br/><br/><label>Dewey Class. No.: </label>001.42 TRO/R