Howitt, Dennis. <br/><br/>
Introduction to SPSS statistics in psychology :  for version 19 and earlier / 
Dennis Howitt, Duncan Cramer. 
 - 5th ed. 
 - Harlow :  Prentice Hall,  2011. 
 - xxxvi, 512 p. :  ill. ;  27 cm. 
<br/><br/><label>ISBN: </label>9780273734260 (pbk.)  RM116.10 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychometrics.<br/>SPSS for Windows.<br/>Psychometrics--Computer programs.