European Commission. Directorate-General for Energy and Transport. (2005). Report on the green paper on energy: Four years of European initiatives. Office for Official Publications of the European Communities.
Cytowanie według stylu Chicago (wyd. 17)European Commission. Directorate-General for Energy and Transport. Report on the Green Paper on Energy: Four Years of European Initiatives. Luxembourg: Office for Official Publications of the European Communities, 2005.
Cytowanie według stylu MLA (wyd. 9)European Commission. Directorate-General for Energy and Transport. Report on the Green Paper on Energy: Four Years of European Initiatives. Office for Official Publications of the European Communities, 2005.
Uwaga: Te cytaty mogą odróżniać się od wytycznej twojego fakultetu..