International Energy Agency. (2018). Oil 2018: Analysis and forecasts to 2023. OECD.
Chicago Style (17th ed.) ZitazioaInternational Energy Agency. Oil 2018: Analysis and Forecasts to 2023. Paris: OECD, 2018.
MLA (9th ed.) ZitazioaInternational Energy Agency. Oil 2018: Analysis and Forecasts to 2023. OECD, 2018.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.