APA
UNITED NATIONS I. E. A. S. A. (. o., UNITED NATIONS I. E. A. S. A. (. o., . (1976). Classification by broad economic categries. New York: United Nations.
Chicago
UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Department of--), UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Department of--), . 1976. Classification by broad economic categries. New York: United Nations.
Harvard
UNITED NATIONS I. E. A. S. A. (. o., UNITED NATIONS I. E. A. S. A. (. o., . (1976). Classification by broad economic categries. New York: United Nations.
MLA
UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Department of--), UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Department of--), . Classification by broad economic categries. New York: United Nations. 1976.
