International Symposium on Motor Carrier Transportation Williamsburg, Va., & National Research Council (U.S.). Transportation Research Board. (1994). International Symposium on Motor Carrier Transportation, Williamsburg, Virginia, May 31-June 4, 1993. National Academy Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)International Symposium on Motor Carrier Transportation Williamsburg, Va., و National Research Council (U.S.). Transportation Research Board. International Symposium on Motor Carrier Transportation, Williamsburg, Virginia, May 31-June 4, 1993. Washington, D.C.: National Academy Press, 1994.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)International Symposium on Motor Carrier Transportation Williamsburg, Va., و National Research Council (U.S.). Transportation Research Board. International Symposium on Motor Carrier Transportation, Williamsburg, Virginia, May 31-June 4, 1993. National Academy Press, 1994.