APA Баримт

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

Чикаго маягийн жагсаалт

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

MLA ишлэл

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

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