Gravetter, Frederick J. and Wallnau, Larry B.  <br/><br/>
Essentials of statistics for the behavioral sciences  
Gravetter, Frederick J. and Wallnau, Larry B.  
 - 5th ed.  
 -   Thomson  2005 
<br/><br/><label>Dewey Class. No.: </label>BK  / T05 GRA.W