Cita APA (7th ed.)
Organisation for Economic Co-operation and Development, International Energy Agency, & ProQuest (Firm). (2011). Coal: Medium-term market report 2011 : market trends and projections to 2016. OECD/IEA.
Cita Chicago (17th ed.)
Organisation for Economic Co-operation and Development, International Energy Agency, i ProQuest (Firm). Coal: Medium-term Market Report 2011 : Market Trends and Projections to 2016. Paris: OECD/IEA, 2011.
Cita MLA (9th ed.)
Organisation for Economic Co-operation and Development, et al. Coal: Medium-term Market Report 2011 : Market Trends and Projections to 2016. OECD/IEA, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.