Howitt, Dennis; Cramer, Duncan. <br/><br/>
Introduction to research methods in psychology 

 - 4th ed. 
 - England  Pearsons  2014 
 - 508p. Index 
<br/><br/><label>ISBN: </label>9780273775058 
<br/><br/><label>Dewey Class. No.: </label>150.72