Dyfyniad APA

United Nations. Economic Commission for Europe. (1992). Management of plastic wastes in the ECE region. United Nations.

Dyfyniad Arddull Chicago

United Nations. Economic Commission for Europe. Management of Plastic Wastes in the ECE Region. New York: United Nations, 1992.

Dyfyniad MLA

United Nations. Economic Commission for Europe. Management of Plastic Wastes in the ECE Region. United Nations, 1992.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.