National Research Council (U.S.). Transportation Research Board. (1976). Research problem statements: Design and construction of transportation facilities. Transportation Research Board, National Academy of Sciences.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Research Council (U.S.). Transportation Research Board. Research Problem Statements: Design and Construction of Transportation Facilities. Washington, D.C: Transportation Research Board, National Academy of Sciences, 1976.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)National Research Council (U.S.). Transportation Research Board. Research Problem Statements: Design and Construction of Transportation Facilities. Transportation Research Board, National Academy of Sciences, 1976.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.