Não informado. (2016). World Energy Statistics and Balances. Organisation for Economic Co-operation and Development, International Energy Agency.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. World Energy Statistics and Balances. Paris: Organisation for Economic Co-operation and Development, International Energy Agency, 2016.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. World Energy Statistics and Balances. Organisation for Economic Co-operation and Development, International Energy Agency, 2016.
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