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Чикаго-гийн эшлэл (17 дахь хэвлэлт)International Energy Agency. Key World Energy Statistics 2015. Paris: Organisation for Economic Co-operation and Development, 2015.
MLA -ийн эшлэл (9 дэх хэвлэлт)International Energy Agency. Key World Energy Statistics 2015. Organisation for Economic Co-operation and Development, 2015.
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