National Research Council (U.S.). Transportation Research Board. Section on public transportation. (1983). Private-sector role in public transportation: An overview. Transportation Research Board, National Academy of Sciences.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Research Council (U.S.). Transportation Research Board. Section on public transportation. Private-sector Role in Public Transportation: An Overview. Washington, D.C: Transportation Research Board, National Academy of Sciences, 1983.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)National Research Council (U.S.). Transportation Research Board. Section on public transportation. Private-sector Role in Public Transportation: An Overview. Transportation Research Board, National Academy of Sciences, 1983.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.