Citazione Stile APA (7a Edizione)

National Research Council (U.S.). Transportation Research Board. Meeting. (1999). Traffic signing, visibility, and rail-highway grade crossings. National Academy Press.

Citazione stile Chigago Style (17a edizione)

National Research Council (U.S.). Transportation Research Board. Meeting. Traffic Signing, Visibility, and Rail-highway Grade Crossings. Washington, D.C: National Academy Press, 1999.

Citatione MLA (9a ed.)

National Research Council (U.S.). Transportation Research Board. Meeting. Traffic Signing, Visibility, and Rail-highway Grade Crossings. National Academy Press, 1999.