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

 - 2nd ed. 
 - U.S.A  Vicki, K NIGHT.  2006. 
 - xi, 534p.:  ill. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9780495091455 
<br/><br/><label>LC Class. No.: </label>BF76.5gra