1. Effect of Raising the Legal Drinking Age on Driver Involvement in Fatal Crashes: The Experience of Thirteen States.;Arnold,1985
2. Enforcement of zero tolerance laws in the US – prevention section;Ferguson,2000
3. Determine Why There are Fewer Young Alcohol-Impaired Drivers;Hedlund,2001
4. U.S. Licensing Systems for Young Drivers: Laws as of March 2006;Insurance Institute for Highway Safety,2006
5. U.S. Licensing Systems for Young Drivers: Laws as of May 2007;Insurance Institute for Highway Safety,2007