Institution of Civil Engineers (Great Britain) & Davis, J. S. (1971). Motorways in Britain: today and tomorrow: Proceedings of the conference organized by the Institution of Civil Engineers in London, 26-28 April 1971. Institution of Civil Engineers.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Institution of Civil Engineers (Great Britain) و Joyce S. Davis. Motorways in Britain: Today and Tomorrow: Proceedings of the Conference Organized by the Institution of Civil Engineers in London, 26-28 April 1971. London,: Institution of Civil Engineers, 1971.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Institution of Civil Engineers (Great Britain) و Joyce S. Davis. Motorways in Britain: Today and Tomorrow: Proceedings of the Conference Organized by the Institution of Civil Engineers in London, 26-28 April 1971. Institution of Civil Engineers, 1971.