Methods in behavioral research 
Cozby, Paul C. 
 - Eight edition. 
 -  McGraw-Hill  Inc.  2004 
 - xi, 396 pages. 
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<br/><br/><label>ISBN: </label>0-07-123235-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychology -- Research -- methodology.
<br/><br/><label>Dewey Class. No.: </label>150.72 C83m 2004