(2007). Energy: Yearly statistics .. Off. for Official Publ. of the Europ. Communities.
Chicago-referens (17:e uppl.)Energy: Yearly Statistics .. Luxembourg: Off. for Official Publ. of the Europ. Communities, 2007.
MLA-referens (8:e uppl.)Energy: Yearly Statistics .. Off. for Official Publ. of the Europ. Communities, 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.