National Research Council (U.S.). Transportation Research Board. Meeting. (1999). Traffic signing, visibility, and rail-highway grade crossings. National Academy Press.
芝加哥风格引文National Research Council (U.S.). Transportation Research Board. Meeting. Traffic Signing, Visibility, and Rail-highway Grade Crossings. Washington, D.C: National Academy Press, 1999.
MLA引文National Research Council (U.S.). Transportation Research Board. Meeting. Traffic Signing, Visibility, and Rail-highway Grade Crossings. National Academy Press, 1999.
警告：这些引文格式不一定是100％准确.