APA
UNITED NATIONS I. E. A. S. A., UNITED NATIONS I. E. A. S. A., . (1990). Commodity trade statistics. New York: U.N.
Chicago
UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS, UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS, . 1990. Commodity trade statistics. New York: U.N.
Harvard
UNITED NATIONS I. E. A. S. A., UNITED NATIONS I. E. A. S. A., . (1990). Commodity trade statistics. New York: U.N.
MLA
UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS, UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS, . Commodity trade statistics. New York: U.N. 1990.
