TY  - BOOK
AU  - Ferster,C.B.
AU  - Skinner,B.F.
TI  - Schedules of reinforcement / 
T2  - The Century Psychology Series
U1  - 152.5 
PY  - 1957///
CY  - New York : 
PB  - Appleton-Century-Crofts, 
KW  - CONDICIONAMIENTO
KW  - MOTIVACION
KW  - REFORZAMIENTO
ER  -