APA
United Nations. Statistical Office. Dept. of economic and social affairs, . (1950). Yearbook of international trade statistics. New York: United Nations.
Chicago
United Nations. Statistical Office. Dept. of economic and social affairs, . 1950. Yearbook of international trade statistics. New York: United Nations.
Harvard
United Nations. Statistical Office. Dept. of economic and social affairs, . (1950). Yearbook of international trade statistics. New York: United Nations.
MLA
United Nations. Statistical Office. Dept. of economic and social affairs, . Yearbook of international trade statistics. New York: United Nations. 1950.
