International Energy Agency, Organisation for Economic Co-operation and Development, & ProQuest (Firm). (2011). Oil information 2011: With 2010 data. International Energy Agency.
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Chicago-čujuhus (17. p.)
International Energy Agency, Organisation for Economic Co-operation and Development, juo ProQuest (Firm). Oil Information 2011: With 2010 Data. Paris: International Energy Agency, 2011.
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MLA-čujuhus (9. p.)
International Energy Agency, et al. Oil Information 2011: With 2010 Data. International Energy Agency, 2011.
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