International energy agency. (2002). World energy outlook 2002. Organisation economic cooperation and development.
Dyfyniad Arddull ChicagoInternational energy agency. World Energy Outlook 2002. France: Organisation economic cooperation and development, 2002.
Dyfyniad MLAInternational energy agency. World Energy Outlook 2002. Organisation economic cooperation and development, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.