TY  - BOOK
AU  - DeRisi,William J.
AU  - Butz,George
TI  - Writing behavioral contracts: a case simulation practice manual 
SN  - 0878221239
PY  - 1975///
CY  - Champaign, Illinois
PB  - Research Press
KW  - Behavior modification
N1  - References : page  87
ER  -