GRAVETTER, FREDERICK J. <br/><br/>
Research methords for the behavioral sciences / 
FREDERICK J. GRAVETTER. 
 - [S.l.] :  THOMSON LEARNING,  2011. 
 - 478 p. 
<br/><br/><label>ISBN: </label>0534197663 (paperback) 9780534197667 (paperback) 
<br/><br/><label>Dewey Class. No.: </label>150.72  / GRA  2011