European Conference of Ministers of Transport. Economic Research Centre, Round Table on Transport Economics, & Beesley, M. E. (1979). Influence of measures designed to restrict the use of certain transport modes. European Conference of Ministers of Transport.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)European Conference of Ministers of Transport. Economic Research Centre, Round Table on Transport Economics, و M. E. Beesley. Influence of Measures Designed to Restrict the Use of Certain Transport Modes. Paris: European Conference of Ministers of Transport, 1979.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)European Conference of Ministers of Transport. Economic Research Centre, et al. Influence of Measures Designed to Restrict the Use of Certain Transport Modes. European Conference of Ministers of Transport, 1979.