Παραπομπή APA
European Commission. (1989). Energy balance sheets 1986-1987= Bilans de l'energie 1986-1987. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleEuropean Commission. Energy Balance Sheets 1986-1987= Bilans De L'energie 1986-1987. Luxembourg: Office for Official Publications of the European Communities, 1989.
Παραπομπή MLAEuropean Commission. Energy Balance Sheets 1986-1987= Bilans De L'energie 1986-1987. Luxembourg: Office for Official Publications of the European Communities, 1989.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.