APA

United States, . (1999). Legislative history of recent primary safety belt laws. Washington, DC: U.S. Dept. of Transportation, National Highway Traffic Safety Administration.

Chicago

United States, . 1999. Legislative history of recent primary safety belt laws. Washington, DC: U.S. Dept. of Transportation, National Highway Traffic Safety Administration.

Harvard

United States, . (1999). Legislative history of recent primary safety belt laws. Washington, DC: U.S. Dept. of Transportation, National Highway Traffic Safety Administration.

MLA

United States, . Legislative history of recent primary safety belt laws. Washington, DC: U.S. Dept. of Transportation, National Highway Traffic Safety Administration. 1999.