APA

de Waele A., . (1975). Economic problems of traffic peaks. Paris: European Conf. Ministers of Transport. Round Table Conf. nr 29.

Chicago

de Waele A, . 1975. Economic problems of traffic peaks. Paris: European Conf. Ministers of Transport. Round Table Conf. nr 29.

Harvard

de Waele A., . (1975). Economic problems of traffic peaks. Paris: European Conf. Ministers of Transport. Round Table Conf. nr 29.

MLA

de Waele A, . Economic problems of traffic peaks. Paris: European Conf. Ministers of Transport. Round Table Conf. nr 29. 1975.