APA (7th ed.) Zitazioa
International Energy Agency. (2014). Coal information: 2014 with 2013 data. International Energy Agency.
Chicago Style (17th ed.) Zitazioa
International Energy Agency. Coal Information: 2014 with 2013 Data. Paris, France: International Energy Agency, 2014.
MLA (9th ed.) Zitazioa
International Energy Agency. Coal Information: 2014 with 2013 Data. International Energy Agency, 2014.
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