APA
UNITED NATIONS E. A. S. A. (. o., UNITED NATIONS E. A. S. A. (. o., . (1973). Principles & recommendations for a vital statistics system. New York: UN.
Chicago
UNITED NATIONS ECONOMIC AND SOCIAL AFFAIRS (Department of-), UNITED NATIONS ECONOMIC AND SOCIAL AFFAIRS (Department of-), . 1973. Principles & recommendations for a vital statistics system. New York: UN.
Harvard
UNITED NATIONS E. A. S. A. (. o., UNITED NATIONS E. A. S. A. (. o., . (1973). Principles & recommendations for a vital statistics system. New York: UN.
MLA
UNITED NATIONS ECONOMIC AND SOCIAL AFFAIRS (Department of-), UNITED NATIONS ECONOMIC AND SOCIAL AFFAIRS (Department of-), . Principles & recommendations for a vital statistics system. New York: UN. 1973.
