APA

European Conference of Ministers of Transport, ECMT, . (1971). Theory and practice in transport economics. 4th international symposium, Hague, 5th-7th October 1971. Proceedings of the debates. Paris: European Conference of Ministers of Transport.

Chicago

European Conference of Ministers of Transport, ECMT, . 1971. Theory and practice in transport economics. 4th international symposium, Hague, 5th-7th October 1971. Proceedings of the debates. Paris: European Conference of Ministers of Transport.

Harvard

European Conference of Ministers of Transport, ECMT, . (1971). Theory and practice in transport economics. 4th international symposium, Hague, 5th-7th October 1971. Proceedings of the debates. Paris: European Conference of Ministers of Transport.

MLA

European Conference of Ministers of Transport, ECMT, . Theory and practice in transport economics. 4th international symposium, Hague, 5th-7th October 1971. Proceedings of the debates. Paris: European Conference of Ministers of Transport. 1971.