Research methods in psychology / 
Glynis M. Breakwell,  Jonathan  A.   Smith and  Daniel  B.  Wright. 
 - 4th ed. 
 - Los Angeles :  Sage,  2012. 
 - xii,602 P. :  ill. 
<br/><br/>Includes bibliographical references(P.563-584) and index. 
<br/><br/><label>ISBN: </label>9780857022646 
<br/><br/><label>LC Class. No.: </label>BF76.5  / .R466