Cozby, Paul C. <br/><br/>
Methods in behavioral research 

 - 10th ed. 
 - Boston  McGraw-Hill   2009 
 - 403 p. :   ill. 
<br/><br/><label>ISBN: </label>9780073370224 
<br/><br/><label>LC Class. No.: </label>BF 76.5  / .C67