Organisation for Economic Co-operation and Development, OECD (Paris, France). (2013). Natural gas information: 2013 with 2012 data. OECD. https://doi.org/10.1787/nat_gas-2013-en
Chicago-Zitierstil (17. Ausg.)Organisation for Economic Co-operation and Development, OECD (Paris, France). Natural Gas Information: 2013 with 2012 Data. Paris: OECD, 2013. https://doi.org/10.1787/nat_gas-2013-en.
MLA-Zitierstil (9. Ausg.)Organisation for Economic Co-operation and Development, OECD (Paris, France). Natural Gas Information: 2013 with 2012 Data. OECD, 2013. https://doi.org/10.1787/nat_gas-2013-en.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.