Gravetter, Frederick J <br/><br/>
Research Methods for the Behavioral Sciences( International Student Edition) 

 - 3th ed.  
 - Australia  Thomson Brooks/ Cole  2009 
 - 614p 
<br/><br/> includes index and biblioraphy 
<br/><br/><label>ISBN: </label>9780495509783  1956 
<br/><br/><label>Dewey Class. No.: </label>O63.1  / G788