Fraenkel, Jack R. <br/><br/>
How to design and evaluate research in education/ 
by. Jack R. Fraenkel and Noerman E. Wallen 
 - USA:  The McGraw-Hill Companies, Inc.,  c2006 
 - vii-594p,: 
<br/><br/><label>ISBN: </label>0-07-298136-9 
<br/><br/><label>Dewey Class. No.: </label>BCir. 370.72  / F848h 2006