National Research Council (U.S.). Transportation Research Board. (1993). Nonmotorized transportation research and issues: Operations and safety; planning and administration. National Academy Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Research Council (U.S.). Transportation Research Board. Nonmotorized Transportation Research and Issues: Operations and Safety; Planning and Administration. Washington, D.C: National Academy Press, 1993.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)National Research Council (U.S.). Transportation Research Board. Nonmotorized Transportation Research and Issues: Operations and Safety; Planning and Administration. National Academy Press, 1993.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.