Dyfyniad APA

International Energy Agency, Organisation for Economic Co-operation and Development, & ProQuest (Firm). (2009). Oil information 2009: With 2008 data = Donnees sur le petrole. OECD : International Energy Agency.

Dyfyniad Arddull Chicago

International Energy Agency, Organisation for Economic Co-operation and Development, and ProQuest (Firm). Oil Information 2009: With 2008 Data = Donnees Sur Le Petrole. Paris: OECD : International Energy Agency, 2009.

Dyfyniad MLA

International Energy Agency, et al. Oil Information 2009: With 2008 Data = Donnees Sur Le Petrole. OECD : International Energy Agency, 2009.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.