APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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