United Nations. office of Public Information. (1965). Landmarks in international co-operation. New York: United Nations.
Dyfyniad Arddull ChicagoUnited Nations. office of Public Information. Landmarks in International Co-operation. New York: United Nations, 1965.
Dyfyniad MLAUnited Nations. office of Public Information. Landmarks in International Co-operation. New York: United Nations, 1965.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.