Planning and Transport Research and Computation (International) Co. Meeting Seminar A. & PTRC Education and Research Services Ltd. (1987). Transport policy: Proceedings of Seminar A held at the PTRC Summer Annual Meeting, University of Bath, England, from 7-11 September, 1987. PTRC Education and Research Services Ltd. on behalf of Planning and Transport Research and Computation (International) Co. Ltd..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Planning and Transport Research and Computation (International) Co. Meeting Seminar A. و PTRC Education and Research Services Ltd. Transport Policy: Proceedings of Seminar A Held at the PTRC Summer Annual Meeting, University of Bath, England, from 7-11 September, 1987. London: PTRC Education and Research Services Ltd. on behalf of Planning and Transport Research and Computation (International) Co. Ltd., 1987.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Planning and Transport Research and Computation (International) Co. Meeting Seminar A. و PTRC Education and Research Services Ltd. Transport Policy: Proceedings of Seminar A Held at the PTRC Summer Annual Meeting, University of Bath, England, from 7-11 September, 1987. PTRC Education and Research Services Ltd. on behalf of Planning and Transport Research and Computation (International) Co. Ltd., 1987.