APA (7e ed.) Bronvermelding

National Research Council (U.S.). Transportation Research Board & National Research Council (U.S.). Transportation Research Board. Meeting. (2006). Traffic control devices, visibility, and rail-highway grade crossings, 2006. Transportation Research Board.

Chicago (17e ed.) Bronvermelding

National Research Council (U.S.). Transportation Research Board en National Research Council (U.S.). Transportation Research Board. Meeting. Traffic Control Devices, Visibility, and Rail-highway Grade Crossings, 2006. Washington, D.C: Transportation Research Board, 2006.

MLA (9e ed.) Bronvermelding

National Research Council (U.S.). Transportation Research Board en National Research Council (U.S.). Transportation Research Board. Meeting. Traffic Control Devices, Visibility, and Rail-highway Grade Crossings, 2006. Transportation Research Board, 2006.