(2001). Energy efficiency: Promotion of energy efficiency in industry and financing of investments. New York: United Nations.
Dyfyniad Arddull ChicagoEnergy Efficiency: Promotion of Energy Efficiency in Industry and Financing of Investments. New York: United Nations, 2001.
Dyfyniad MLAEnergy Efficiency: Promotion of Energy Efficiency in Industry and Financing of Investments. New York: United Nations, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.