(1977). The United nations and outer space. New York: United Nation Publication.
Dyfyniad Arddull ChicagoThe United Nations and Outer Space. New York: United Nation Publication, 1977.
Dyfyniad MLAThe United Nations and Outer Space. New York: United Nation Publication, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.