European Commission (Directorate-General for Energy and Transport, Brussels). (2007). Electricity and gas =: Strom und Gas Electricidad y gas : you choose! ([1st ed.].). European Communities.
Chicago-Zitierstil (17. Ausg.)European Commission (Directorate-General for Energy and Transport, Brussels). Electricity and Gas =: Strom Und Gas Electricidad Y Gas : You Choose! [1st ed.]. Brussels: European Communities, 2007.
MLA-Zitierstil (9. Ausg.)European Commission (Directorate-General for Energy and Transport, Brussels). Electricity and Gas =: Strom Und Gas Electricidad Y Gas : You Choose! [1st ed.]. European Communities, 2007.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.