Gravetter,  J. Frederick  <br/><br/>
Essentials of statistics for the behavioral sciences/  
Frederick J. Gravetter.  
 - 6th ed. 
 - USA  :  Wadsworth,  2008. 
 - 575 p. : 
<br/><br/> Includes index  
<br/><br/><label>ISBN: </label>9.7049538396e+011 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics 
<br/><br/><label>LC Class. No.: </label>HA29.G726 2008