Παραπομπή σε μορφή APA (7η εκδ.)
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.
Παραπομπή σε μορφή Chicago (17η εκδ.)
Organisation for Economic Co-operation and Development, International Energy Agency, και ProQuest (Firm). Coal: Medium-term Market Report 2011 : Market Trends and Projections to 2016. Paris: OECD/IEA, 2011.
Παραπομπή σε μορφή MLA (9th εκδ.)
Organisation for Economic Co-operation and Development, et al. Coal: Medium-term Market Report 2011 : Market Trends and Projections to 2016. OECD/IEA, 2011.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.