Pérez Figueroa, Silverio, <br/><br/>
Humortivación 
Silverio Pérez. 
 - 19 ed. 
 - Puerto Rico  DCT, Inc.  2000. 
 - 127 p.  ill.  19 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Success<br/>Motivation (Psychology)
<br/><br/><label>Dewey Class. No.: </label>158.1  / P9449h 2000