International Energy Agency. (1979). Crude oil import prices, 1973-1978: Evolution des prix a l'importation du petrole brut entre 1973 et 1978. Organisation for Economic Co-operation and Development.
Dyfyniad Arddull ChicagoInternational Energy Agency. Crude Oil Import Prices, 1973-1978: Evolution Des Prix a L'importation Du Petrole Brut Entre 1973 Et 1978. [Paris]: Organisation for Economic Co-operation and Development, 1979.
Dyfyniad MLAInternational Energy Agency. Crude Oil Import Prices, 1973-1978: Evolution Des Prix a L'importation Du Petrole Brut Entre 1973 Et 1978. Organisation for Economic Co-operation and Development, 1979.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.