International Energy Agency, Organisation for Economic Co-operation and Development, & ProQuest (Firm). (2011). Coal information 2011, with 2010 data. International Energy Agency.
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Chicago Style (17th ed.) Zitazioa
International Energy Agency, Organisation for Economic Co-operation and Development, eta ProQuest (Firm). Coal Information 2011, with 2010 Data. [Paris]: International Energy Agency, 2011.
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MLA (9th ed.) Zitazioa
International Energy Agency, et al. Coal Information 2011, with 2010 Data. International Energy Agency, 2011.
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