Lepper Mark R Ed. <br/><br/>
Hidden costs of reward    New perspectives on the psychology of human motivation.      
Lepper Mark R Ed.; Greene David Ed. 
 - New Jersey   Lawrence Erlbaum Associates      1978 
 - xiii,262p.  cm. 
<br/><br/><label>Standard No.: </label>36859 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>S:66, L8