APA (7th ed.) Citation

United nations. (1989). UNCTAD Commodity Yearbook 1989. United Nations.

Chicago Style (17th ed.) Citation

United nations. UNCTAD Commodity Yearbook 1989. New York: United Nations, 1989.

MLA (8th ed.) Citation

United nations. UNCTAD Commodity Yearbook 1989. United Nations, 1989.

Warning: These citations may not always be 100% accurate.