APA
UNITED NATIONS I. E. A. S. A. (. o., UNITED NATIONS I. E. A. S. A. (. o., . (1981). Population and vital statistics report. New York: United Nations.
Chicago
UNITED NATIONS INTRENATIONAL ECONOMIC AND SOCIAL AFFAIRS (Department of--), UNITED NATIONS INTRENATIONAL ECONOMIC AND SOCIAL AFFAIRS (Department of--), . 1981. Population and vital statistics report. New York: United Nations.
Harvard
UNITED NATIONS I. E. A. S. A. (. o., UNITED NATIONS I. E. A. S. A. (. o., . (1981). Population and vital statistics report. New York: United Nations.
MLA
UNITED NATIONS INTRENATIONAL ECONOMIC AND SOCIAL AFFAIRS (Department of--), UNITED NATIONS INTRENATIONAL ECONOMIC AND SOCIAL AFFAIRS (Department of--), . Population and vital statistics report. New York: United Nations. 1981.
