George, Darren <br/><br/>
IBM SPSS statistics 23 step by step  a simple guide and reference 
Darren George and Paul Mallery 
 - 14th ed.  
 - New York  Routledge  2016 
 - xiii, 382p  
<br/><br/> Includes bibliographical references and index  
<br/><br/><label>ISBN: </label>9780134320250  
<br/><br/><label>Dewey Class. No.: </label>005.55 GEO