Παραπομπή APA
European Commission. Directorate-General for Energy. (1999). Energy in Europe 1998: Annual energy review. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleEuropean Commission. Directorate-General for Energy. Energy in Europe 1998: Annual Energy Review. Luxembourg: Office for Official Publications of the European Communities, 1999.
Παραπομπή MLAEuropean Commission. Directorate-General for Energy. Energy in Europe 1998: Annual Energy Review. Luxembourg: Office for Official Publications of the European Communities, 1999.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.