Gravetter Frederick J. <br/><br/>
Research Methods for the Behavioral Sciences: 

 - 3rd  ed. 
 - USA  Wadsworth  2006 
 - xiv, 614p.:  ill. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9780495509837 
<br/><br/><label>LC Class. No.: </label>BF76.5gra