APA

U.S. Department of Transportation. Federal Highway Administration, . (1973). Handbook of highway safety design and operating practices. Washington DC: U.S. Department of Transportation. Federal Highway Administration.

Chicago

U.S. Department of Transportation. Federal Highway Administration, . 1973. Handbook of highway safety design and operating practices. Washington DC: U.S. Department of Transportation. Federal Highway Administration.

Harvard

U.S. Department of Transportation. Federal Highway Administration, . (1973). Handbook of highway safety design and operating practices. Washington DC: U.S. Department of Transportation. Federal Highway Administration.

MLA

U.S. Department of Transportation. Federal Highway Administration, . Handbook of highway safety design and operating practices. Washington DC: U.S. Department of Transportation. Federal Highway Administration. 1973.