APA (7th ed.) Citation

United Nations. Economic Commission for Europe. (1978). Three decades of the United Nations Economic Commission for Europe. United Nations.

Chicago Style (17th ed.) Citation

United Nations. Economic Commission for Europe. Three Decades of the United Nations Economic Commission for Europe. New York: United Nations, 1978.

MLA (9th ed.) Citation

United Nations. Economic Commission for Europe. Three Decades of the United Nations Economic Commission for Europe. United Nations, 1978.