Institution of Civil Engineers (Great Britain). (1973). Transportation engineering 1972: Proceedings of the conference organized by the Institution of Civil Engineers in London, 18-21 April 1972. Institution of Civil Engineers.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Institution of Civil Engineers (Great Britain). Transportation Engineering 1972: Proceedings of the Conference Organized by the Institution of Civil Engineers in London, 18-21 April 1972. London: Institution of Civil Engineers, 1973.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Institution of Civil Engineers (Great Britain). Transportation Engineering 1972: Proceedings of the Conference Organized by the Institution of Civil Engineers in London, 18-21 April 1972. Institution of Civil Engineers, 1973.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.