APA
UNITED NATIONS I. E. A. S. A. (. o., UNITED NATIONS I. E. A. S. A. (. o., . (1979). Yearbook of construction statistics 1968-1977. New York: United Nations.
Chicago
UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Dept of-), UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Dept of-), . 1979. Yearbook of construction statistics 1968-1977. New York: United Nations.
Harvard
UNITED NATIONS I. E. A. S. A. (. o., UNITED NATIONS I. E. A. S. A. (. o., . (1979). Yearbook of construction statistics 1968-1977. New York: United Nations.
MLA
UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Dept of-), UNITED NATIONS INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS (Dept of-), . Yearbook of construction statistics 1968-1977. New York: United Nations. 1979.
