Fundamental statistics in psychology and education 
Guilford, J.P. 
 - Sixth edition. 
 -  McGraw-Hill Book Company.  1978 
 - 545 pages. 
 - McGraw-Hill series in psychology .
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<br/><br/><label>ISBN: </label>0-07-025150-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational statistics.
<br/><br/><label>Dewey Class. No.: </label>519.5 G94f 1978