TY  - GEN
AU  - Higgins, Stephen T.
AU  - Silverman, Kenneth
TI  - Motivating behavior change among illicit-drug abusers : research on contingency management interventions
SN  - 1557985707
PY  - 1999///
CY  - Washington
PB  - APA
KW  - contingency management
KW  - drugs
KW  - gedragstherapie
KW  - hulpverlening
ER  -