Cita APA (7th ed.)
United Nations. Dept. of Public Information. (1990). The world economy: A global challenge. United Nations Dept. of Public Information.
Cita Chicago (17th ed.)
United Nations. Dept. of Public Information. The World Economy: A Global Challenge. New York: United Nations Dept. of Public Information, 1990.
Cita MLA (9th ed.)
United Nations. Dept. of Public Information. The World Economy: A Global Challenge. United Nations Dept. of Public Information, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.