APA引文

United Nations. Economic Commission for Africa. (1992). Survey of economic and social conditions in Africa, 1989-1990. United Nations.

Chicago Style (17th ed.) Citation

United Nations. Economic Commission for Africa. Survey of Economic and Social Conditions in Africa, 1989-1990. New York: United Nations, 1992.

MLA引文

United Nations. Economic Commission for Africa. Survey of Economic and Social Conditions in Africa, 1989-1990. United Nations, 1992.

警告：這些引文格式不一定是100％准確.