TY  - BOOK
AU  - Kazdin Alan E
TI  - Token economy :  A review and evaluation   
T2  - Plenum behavior therapy series
SN  - 0306309629
U1  - SN1:86, L7 
PY  - 1977///
CY  - New York
PB  - Plenum Press USA       
KW  - Psychology
N1  - Bib p 287-327
ER  -