Cita APA (7th ed.)
International Energy Agency, Organisation for Economic Co-operation and Development, & ProQuest (Firm). (2008). Coal information: With 2007 data. OECD/IEA.
Cita Chicago (17th ed.)
International Energy Agency, Organisation for Economic Co-operation and Development, i ProQuest (Firm). Coal Information: With 2007 Data. Paris: OECD/IEA, 2008.
Cita MLA (9th ed.)
International Energy Agency, et al. Coal Information: With 2007 Data. OECD/IEA, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.