Ayllon, Teodoro,  1929- <br/><br/>
The token economy :  a motivational system for therapy and rehabilitation / 
Teodoro Ayllon, Nathan Azrin 
 - Englewood Cliffs, N. J. :  Prentice-Hall,  1968 
 - viii, 288 p. ;  23 cm. 
 - The century psychology series .
<br/><br/> Includes index. 
<br/><br/>p. 271-279. 
<br/><br/><label>ISBN: </label>013919357X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Token economy (Psychology)