Statistics for the behavioral Sciences 
Gravetter, Frederick 
 - 9th ed. 
 - New Delhi  Cengage  2013 
 - xxi, 767p. 
<br/><br/><label>ISBN: </label>8131521045 
<br/><br/><label>LC Class. No.: </label>QA276.12   / .G73 2013 c.1