European Conference of Ministers of Transport & Organisation for Economic Co-operation and Development. (1994). Internalising the social costs of transport =: European Conference of Ministers of Transport; Organisation for Economic Co-operation and Development. OECD.
Παραπομπή σε μορφή Chicago (17η εκδ.)European Conference of Ministers of Transport και Organisation for Economic Co-operation and Development. Internalising the Social Costs of Transport =: European Conference of Ministers of Transport; Organisation for Economic Co-operation and Development. Paris: OECD, 1994.
Παραπομπή σε μορφή MLA (9th εκδ.)European Conference of Ministers of Transport και Organisation for Economic Co-operation and Development. Internalising the Social Costs of Transport =: European Conference of Ministers of Transport; Organisation for Economic Co-operation and Development. OECD, 1994.