APA
United Nations. Department of Economic and Social Affairs, . (1977). Repair of buildings damaged by earthquakes. New York: United Nations.
Chicago
United Nations. Department of Economic and Social Affairs, . 1977. Repair of buildings damaged by earthquakes. New York: United Nations.
Harvard
United Nations. Department of Economic and Social Affairs, . (1977). Repair of buildings damaged by earthquakes. New York: United Nations.
MLA
United Nations. Department of Economic and Social Affairs, . Repair of buildings damaged by earthquakes. New York: United Nations. 1977.