Walliman. Nicholas, <br/><br/>
Research Methods.  The Basics, 

 - New York.  Routledge;  2011. 
 - xiii. 183p.  20cm. 
<br/><br/><label>ISBN: </label>9780415489942 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research
<br/><br/><label>Dewey Class. No.: </label>364.072WAL