International Energy Agency. (2021). Industry sector detailed data and indicators (Edition 2021). OECD Publishing. https://doi.org/10.1787/fc70a8df-en
Chicago-Zitierstil (17. Ausg.)International Energy Agency. Industry Sector Detailed Data and Indicators (Edition 2021). Paris: OECD Publishing, 2021. https://doi.org/10.1787/fc70a8df-en.
MLA-Zitierstil (9. Ausg.)International Energy Agency. Industry Sector Detailed Data and Indicators (Edition 2021). OECD Publishing, 2021. https://doi.org/10.1787/fc70a8df-en.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.