Pollock, Philip H. <br/><br/>
An SPSS Companion to Political Analysis 

 - 3rd ed. 
 - Washington  CQ Press Ltd.  2009 
 - xv, 261 p 
<br/><br/><label>ISBN: </label>9780872896079 
<br/><br/><label>Dewey Class. No.: </label>320.02855