APA
"UNITED NATIONS I. E. A. S. A. (. o., "UNITED NATIONS I. E. A. S. A. (. o., . (1988). World statistics in brief. New: York U.N.
Chicago
"UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Deptt of-).", "UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Deptt of-).", . 1988. World statistics in brief. New: York U.N.
Harvard
"UNITED NATIONS I. E. A. S. A. (. o., "UNITED NATIONS I. E. A. S. A. (. o., . (1988). World statistics in brief. New: York U.N.
MLA
"UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Deptt of-).", "UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Deptt of-).", . World statistics in brief. New: York U.N. 1988.
