1. Lawrence M. Salinger, Encyclopedia of white-collar & corporate crime: A – I, Volume 1, page 78, ISBN 0-7619-3004-3, 2005.
2. National Drug Intelligence Center (August 2011). "National Drug Threat Assessment". p. 40. Retrieved 20 September 2011.
3. a b "National Money Laundering Threat Assessment". December 2005. p. 33. Retrieved 3 March 2011.
4. Baker, Raymond (2005). Capitalism's Achilles Heel. Wiley.
5. a b Financial Action Task Force. "Global Money Laundering and Terrorist Financing Threat Assessment". Retrieved 3 March 2011.
6. "Underground Economy Issues. Ontario Construction Secretariat".
7. "Tax amnesties turn HMRC into 'biggest money-laundering operation in history'". Retrieved 14 June 2013.