APA
UNITED NATIONS I. E. A. S. A. o., UNITED NATIONS I. E. A. S. A. o., . (1990). Commodity trade statistics,1988. New York: United Nations.
Chicago
UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS(Department of), UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS(Department of), . 1990. Commodity trade statistics,1988. New York: United Nations.
Harvard
UNITED NATIONS I. E. A. S. A. o., UNITED NATIONS I. E. A. S. A. o., . (1990). Commodity trade statistics,1988. 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,1988. New York: United Nations. 1990.
