Energy EU 25: EU Electricity & Gas Markets. ABS Energy Research.
Čikaški stil citiranja (17. izdanje)Energy EU 25: EU Electricity & Gas Markets. ABS Energy Research.
MLA način citiranja (9. izdanje)Energy EU 25: EU Electricity & Gas Markets. ABS Energy Research.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.