Παραπομπή σε μορφή APA (7η εκδ.)

European Commission. (2012). Energy market in the European Union in 2011. Publications Office of the European Union.

Παραπομπή σε μορφή Chicago (17η εκδ.)

European Commission. Energy Market in the European Union in 2011. Luxembourg: Publications Office of the European Union, 2012.

Παραπομπή σε μορφή MLA (8th εκδ.)

European Commission. Energy Market in the European Union in 2011. Publications Office of the European Union, 2012.