International Conference on Low-volume Roads Iowa State University & National Research Council (U.S.). Transportation Research Board. (1979). Low-volume roads: Second International Conference. Transportation Research Board, Commission on Sociotechnical Systems, National Research Council, National Academy of Sciences.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)International Conference on Low-volume Roads Iowa State University و National Research Council (U.S.). Transportation Research Board. Low-volume Roads: Second International Conference. Washington: Transportation Research Board, Commission on Sociotechnical Systems, National Research Council, National Academy of Sciences, 1979.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)International Conference on Low-volume Roads Iowa State University و National Research Council (U.S.). Transportation Research Board. Low-volume Roads: Second International Conference. Transportation Research Board, Commission on Sociotechnical Systems, National Research Council, National Academy of Sciences, 1979.