United Nations Environment Programme. (2003). Tunza: Acting for a better world. United Nations Environment Programme.
Dyfyniad Arddull ChicagoUnited Nations Environment Programme. Tunza: Acting for a Better World. [Nairobi, Kenya]: United Nations Environment Programme, 2003.
Dyfyniad MLAUnited Nations Environment Programme. Tunza: Acting for a Better World. United Nations Environment Programme, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.