1. United Nations Drug Control Program, World Illicit Drugs Report 2000–01, New York, 2001.
2. Australian Bureau of Criminal Intelligence, Australian Illicit Drug Report 1998–99, 2000.
3. Australian Bureau of Criminal Intelligence, Australian Illicit Drug Report 2000–01, 2002.
4. Australian Institute of Criminology, 2001. Trends in the Prevalence of Drugs, Australia 1988–1998, National Drug Strategy Household Survey, Unit Record Files, 1988–1998, http://www.aic.gov.au/research/drugs/stats/prevalence/trendsdrugs88-98.html (3-25-2002).
5. Clandestinely Produced Drugs and Precursors;Cooper,1989