1. Advisory Council on the Misuse of Drugs. (1988). AIDS and drug misuse: Parts 1 and 2. London: HMSO.
2. Hidden need for drug treatment services: Measuring levels of problematic drug use in the North West of England;Beynon;Journal of Public Health Medicine,2001
3. Beynon, C., Birtles, R. L., & Bellis, M. A. (2001). Drug services in Merseyside and Cheshire 2000/1: Prevalence and outcomes. Liverpool: Liverpool John Moores University.
4. Beynon, C., McVeigh, J., & Bellis, M. A. (2003). Drug treatment in Cheshire & Merseyside: The first year of the National Drug Treatment Monitoring System (NDTMS), 2001/02. Liverpool: Liverpool John Moores University.
5. The optimal size for attributor for use with the University of Manchester Drug Misuse Database;Crabbe;Addiction,1996