REFERENCES
- United Nations Drug Control Programme. World Drug Report. UNDCP, New York 1997
- United Nations Drug Control Programme. Global Illicit Drug Trends 1999. UNDCP, New York 1999
- United Nations Drug Control Programme. Economic and Social Consequences of Drug Abuse and Illicit Trafficking. UNDCP, New York 1997
- United Nations. Political Declaration arising from the Twentieth Special Session of the United Nations General Assembly on the Global Illicit Drug Problem. UN, New York 1998