Festinger, Leon. <br/><br/>
Research methods in the behavioral sciences 

 - New York :  Holt, Rinehart,  1966 
 - 660 p. 
<br/><br/><label>LCCN: </label>52662 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psicología social--Metodología.
<br/><br/><label>Dewey Class. No.: </label>150.18  / F4