APA
UNITED NATIONS. INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Department of--), UNITED NATIONS. INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Department of--), . (1991). Commodity trade statistics, 1989. New York: United Nations.
Chicago
UNITED NATIONS. INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Department of--), UNITED NATIONS. INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Department of--), . 1991. Commodity trade statistics, 1989. New York: United Nations.
Harvard
UNITED NATIONS. INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Department of--), UNITED NATIONS. INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Department of--), . (1991). Commodity trade statistics, 1989. New York: United Nations.
MLA
UNITED NATIONS. INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Department of--), UNITED NATIONS. INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Department of--), . Commodity trade statistics, 1989. New York: United Nations. 1991.
