1. The Analysis of Controlled Substances. John Wiley: Chichester, 2003.
2. The Misuse of Drugs Act, A Guide for Forensic Scientists. Royal Society of Chemistry: Cambridge, 2003.
3. Drug Seizure and Offender Statistics, United Kingdom, 2000, Home Office: UK, No. 4/02, 2002.
4. Drug Trafficking Act 1994, Chapter c. 37 Part III Section 42.
5. Proceeds of Crime Act 2002, chap. 29, part 5, Civil Recovery of the Proceeds, etc. of Unlawful Conduct, chap. 3, section 294.