1. Substance Abuse and Mental Health Services Administration Results from the 2009 National Survey on Drug Use and Health: Volume I Rockville, MD U.S. Department of Health and Human Services
2. National Highway Traffic Safety Administration Washington, DC U.S. Department of Transportation
3. Jones RK Shinar D Walsh JM State of knowledge of drug-impaired driving Springfield, VA National Highway Traffic Safety Administration, U.S. Department of Transportation
4. A review of drug use and driving: epidemiology, impairment, risk factors and risk perceptions;Kelly;Drug Alcohol Rev,2004
5. Guidelines for research on drugged driving;Walsh;Addiction,2008