APA (7th ed.) Citation

United Nations. Department of International Economic and Social Affairs. (1989). The United Nations population projection computer programme: A user?s manual. United Nations.

Chicago Style (17th ed.) Citation

United Nations. Department of International Economic and Social Affairs. The United Nations Population Projection Computer Programme: A User?s Manual. New York: United Nations, 1989.

MLA (9th ed.) Citation

United Nations. Department of International Economic and Social Affairs. The United Nations Population Projection Computer Programme: A User?s Manual. United Nations, 1989.