Research methods in psychology/ 
edited by Glynis M Breakwell, Jonathan A. Smith and Daniel B. Wright 
 - 4th.ed. 
 - Los Angeles:  SAGE Publications Ltd,  2012-05-15. 
 - 602 p. 
<br/><br/><label>ISBN: </label>0857022644 
<br/><br/><label>Dewey Class. No.: </label>150.724  / BRE/R