APA
European conference of Ministers of Transport. Round table conference 52, . (1981). Transport and energy. Paris: European conference of Ministers of Transport. Round table conference 52.
Chicago
European conference of Ministers of Transport. Round table conference 52, . 1981. Transport and energy. Paris: European conference of Ministers of Transport. Round table conference 52.
Harvard
European conference of Ministers of Transport. Round table conference 52, . (1981). Transport and energy. Paris: European conference of Ministers of Transport. Round table conference 52.
MLA
European conference of Ministers of Transport. Round table conference 52, . Transport and energy. Paris: European conference of Ministers of Transport. Round table conference 52. 1981.