DeCharms, Richard <br/><br/>
Enhancing motivation :  change in the classroom / 
by Richard DeCharms ; in collaboration with Dennis J. Shea ... [et al.]. 
 - New York :  Irvington,  1976. 
 - 279 p. 
 - The Irvington social relations series .
<br/><br/><label>ISBN: </label>0470013923 
<br/><br/><label>Encabezamiento--Tema: </label><br/>Dinámica de grupos