Mangal, S K <br/><br/>
Statistics in psychology and education/ 

 - 2nd 
 - New Delhi:  Prentice-Hall,  2002 
 - 404p. 
<br/><br/><label>ISBN: </label>8120320883 
<br/><br/><label>Source: </label> SHE24-03-2006  151