WHO Expert Committee on Drug Dependence. (1999). WHO Expert Committee on Drug Dependence: Twenty-first report. World Health Organization.
Chicago-Zitierstil (17. Ausg.)WHO Expert Committee on Drug Dependence. WHO Expert Committee on Drug Dependence: Twenty-first Report. Geneva: World Health Organization, 1999.
MLA-Zitierstil (9. Ausg.)WHO Expert Committee on Drug Dependence. WHO Expert Committee on Drug Dependence: Twenty-first Report. World Health Organization, 1999.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.