International Energy Agency & ProQuest (Firm). (2006). Ukraine energy policy review 2006. OECD/IEA.
Chicago Style (17th ed.) ZitazioaInternational Energy Agency eta ProQuest (Firm). Ukraine Energy Policy Review 2006. Paris: OECD/IEA, 2006.
MLA (9th ed.) ZitazioaInternational Energy Agency eta ProQuest (Firm). Ukraine Energy Policy Review 2006. OECD/IEA, 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.