Dyfyniad APA

United Nations. Dept. of Public Information. (1990). The world economy: A global challenge. United Nations Dept. of Public Information.

Dyfyniad Arddull Chicago

United Nations. Dept. of Public Information. The World Economy: A Global Challenge. New York: United Nations Dept. of Public Information, 1990.

Dyfyniad MLA

United Nations. Dept. of Public Information. The World Economy: A Global Challenge. United Nations Dept. of Public Information, 1990.

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