Rosenthal, Robert <br/><br/>
Essentials of behavioral research :  methods and data analysis / 
Robert Rosenthal, Ralph L. Rosnow 
 - 2 
 - Boston :  McGraw-Hill,  1991       
 - xviii, 691 p. 
 - McGraw-Hill Series in Psychology .
<br/><br/><label>ISBN: </label>0070539294 
<br/><br/><label>LC Class. No.: </label>BF 76.5 R815e 1991