Cozby Paul C. <br/><br/>
Methods in behavioral research / 
Paul C. Cozby 
 - 9th ed 
 - Boston :  Mc-graw hill,  2006. 
 - XV, 410 p. :  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>9780073531816 
<br/><br/><label>Dewey Class. No.: </label>150.72/  / COZ