Παραπομπή σε μορφή APA (7η εκδ.)

European Commission. (2019). EU energy in figures: Statistical pocketbook 2019. Publications Office of the European Union.

Παραπομπή σε μορφή Chicago (17η εκδ.)

European Commission. EU Energy in Figures: Statistical Pocketbook 2019. Luxembourg: Publications Office of the European Union, 2019.

Παραπομπή σε μορφή MLA (8th εκδ.)

European Commission. EU Energy in Figures: Statistical Pocketbook 2019. Publications Office of the European Union, 2019.