National Research Council (U.S.). Transportation Research Board. Committee on Operational Effects of Geometrics. (1982). Research problem statements: Operational effects of geometrics. Transportation Research Board, National Academy of Sciences.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)National Research Council (U.S.). Transportation Research Board. Committee on Operational Effects of Geometrics. Research Problem Statements: Operational Effects of Geometrics. Washington, DC: Transportation Research Board, National Academy of Sciences, 1982.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)National Research Council (U.S.). Transportation Research Board. Committee on Operational Effects of Geometrics. Research Problem Statements: Operational Effects of Geometrics. Transportation Research Board, National Academy of Sciences, 1982.