Cundill, M. A., & Watts, P. F. (1973). Bus boarding and alighting times. Public Transport Division, Transport Operations Dept., Transport and Road Research Laboratory Available through the National Technical Information Service].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Cundill, M. A., و P. F. Watts. Bus Boarding and Alighting Times. Crowthorne, Berkshire, [Springfield, Va: Public Transport Division, Transport Operations Dept., Transport and Road Research Laboratory Available through the National Technical Information Service], 1973.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Cundill, M. A., و P. F. Watts. Bus Boarding and Alighting Times. Public Transport Division, Transport Operations Dept., Transport and Road Research Laboratory Available through the National Technical Information Service], 1973.