Organisation for Economic Co-operation and Development, OECD (Paris, France). (2015). Coal information: 2015 with 2014 data. OECD. https://doi.org/10.1787/coal-2015-en
Citácia podle Chicago (17th ed.)Organisation for Economic Co-operation and Development, OECD (Paris, France). Coal Information: 2015 with 2014 Data. Paris: OECD, 2015. https://doi.org/10.1787/coal-2015-en.
Citácia podľa MLA (8th ed.)Organisation for Economic Co-operation and Development, OECD (Paris, France). Coal Information: 2015 with 2014 Data. OECD, 2015. https://doi.org/10.1787/coal-2015-en.
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