Vaus, D. A. De, <br/><br/>
Research Design in Social Research : 

 -  SAGE,  2001. 
 - 308 pages 
<br/><br/><label>ISBN: </label>9780761953470 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Reference.
<br/><br/><label>Dewey Class. No.: </label>300.72  / VAU