APA (7th ed.) Zitazioa

International Energy Agency, Organisation for Economic Co-operation and Development, & ProQuest (Firm). (2009). Natural gas market review 2009. OECD : International Energy Agency.

Chicago Style (17th ed.) Zitazioa

International Energy Agency, Organisation for Economic Co-operation and Development, eta ProQuest (Firm). Natural Gas Market Review 2009. Paris: OECD : International Energy Agency, 2009.

MLA (9th ed.) Zitazioa

International Energy Agency, et al. Natural Gas Market Review 2009. OECD : International Energy Agency, 2009.