European Commission. Directorate-General for Energy and Transport. (2009). A Sustainable future for transport: Towards an integrated, technology- led and user-friendly system. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleEuropean Commission. Directorate-General for Energy and Transport. A Sustainable Future for Transport: Towards an Integrated, Technology- Led and User-friendly System. Luxembourg: Office for Official Publications of the European Communities, 2009.
Παραπομπή MLAEuropean Commission. Directorate-General for Energy and Transport. A Sustainable Future for Transport: Towards an Integrated, Technology- Led and User-friendly System. Luxembourg: Office for Official Publications of the European Communities, 2009.