Παραπομπή APA
European Commission. (2004). The single European sky: Implementing political commitments. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleEuropean Commission. The Single European Sky: Implementing Political Commitments. Luxembourg: Office for Official Publications of the European Communities, 2004.
Παραπομπή MLAEuropean Commission. The Single European Sky: Implementing Political Commitments. Luxembourg: Office for Official Publications of the European Communities, 2004.
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