Grorge, Darren. Mallery, Paul. <br/><br/>
IBM statistics 21 step by step: a simple guide and reference. 

 - 13th ed. 
 - U.S.A. ;  Pearson Education ,  c2014. 
 - 406p. 
<br/><br/><label>ISBN: </label>0205985513 9780205985517 
<br/><br/><label>Subjects--Topical Terms: </label><br/>IBM Statistics 21.<br/>Step by Step SPSS.<br/>Statistics.
<br/><br/><label>National Library of Medicine Call No.: </label>WA 950