APA

U.S. Department of Transportation. National Highway Traffic Safety Administration, . (1980). Life-saving benefits of the 55 mph national speed limit. Washington DC: U.S. Department of Transportation. National Highway Traffic Safety Administration.

Chicago

U.S. Department of Transportation. National Highway Traffic Safety Administration, . 1980. Life-saving benefits of the 55 mph national speed limit. Washington DC: U.S. Department of Transportation. National Highway Traffic Safety Administration.

Harvard

U.S. Department of Transportation. National Highway Traffic Safety Administration, . (1980). Life-saving benefits of the 55 mph national speed limit. Washington DC: U.S. Department of Transportation. National Highway Traffic Safety Administration.

MLA

U.S. Department of Transportation. National Highway Traffic Safety Administration, . Life-saving benefits of the 55 mph national speed limit. Washington DC: U.S. Department of Transportation. National Highway Traffic Safety Administration. 1980.