European Commission, Directorate-General for Energy and Transport (Brussels, Belgium). (2004). The single European sky: Implementing political commitments. Office for Official Publications of the European Communities.
Chicago-Zitierstil (17. Ausg.)European Commission, Directorate-General for Energy and Transport (Brussels, Belgium). The Single European Sky: Implementing Political Commitments. Luxembourg: Office for Official Publications of the European Communities, 2004.
MLA-Zitierstil (9. Ausg.)European Commission, Directorate-General for Energy and Transport (Brussels, Belgium). The Single European Sky: Implementing Political Commitments. Office for Official Publications of the European Communities, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.