APA
UNITED NATIONS I. E. A. S. A. (. o., UNITED NATIONS I. E. A. S. A. (. o., . (1991). Commodity trade statistics, 1991. 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, 1991. New York: United Nations.
Harvard
UNITED NATIONS I. E. A. S. A. (. o., UNITED NATIONS I. E. A. S. A. (. o., . (1991). Commodity trade statistics, 1991. 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, 1991. New York: United Nations. 1991.
