APA
United Nations Economic and social Affairs (Dept of-), United Nations Economic and social Affairs (Dept of-), . (1977). World Statistics in brief. New York: United Nations.
Chicago
United Nations Economic and social Affairs (Dept of-), United Nations Economic and social Affairs (Dept of-), . 1977. World Statistics in brief. New York: United Nations.
Harvard
United Nations Economic and social Affairs (Dept of-), United Nations Economic and social Affairs (Dept of-), . (1977). World Statistics in brief. New York: United Nations.
MLA
United Nations Economic and social Affairs (Dept of-), United Nations Economic and social Affairs (Dept of-), . World Statistics in brief. New York: United Nations. 1977.
