APA (7th ed.) Citation

United Nations. Economic Commission for Europe. (1991). Sustainable energy developments in Europe and North America. United Nations.

Chicago Style (17th ed.) Citation

United Nations. Economic Commission for Europe. Sustainable Energy Developments in Europe and North America. New York: United Nations, 1991.

MLA (9th ed.) Citation

United Nations. Economic Commission for Europe. Sustainable Energy Developments in Europe and North America. United Nations, 1991.