APA

U.S. Department of Transportation, Federal Railroad Administration & Offic of Safety. (1993). Track safety standards. Washington DC: U.S. Department of Transportation.

Chicago

U.S. Department of Transportation, Federal Railroad Administration and Offic of Safety. 1993. Track safety standards. Washington DC: U.S. Department of Transportation.

Harvard

U.S. Department of Transportation, Federal Railroad Administration and Offic of Safety. (1993). Track safety standards. Washington DC: U.S. Department of Transportation.

MLA

U.S. Department of Transportation, Federal Railroad Administration and Offic of Safety. Track safety standards. Washington DC: U.S. Department of Transportation. 1993.