Christensen, Larry B <br/><br/>
Reseach methods, design and analysis 

 - 11th ed 
 - Allyn & Bacon, Boston  2011 
 - xx,539 
<br/><br/><label>ISBN: </label>978-0-205-70165-0 
<br/><br/><label>Dewey Class. No.: </label>307.2 Chr