APA
UNITED NATIONS E. S. I. A. P. A. P. D., UNITED NATIONS E. S. I. A. P. A. P. D., . (1996). Levels and trends of contraceptive use. New York: UN.
Chicago
UNITED NATIONS ECONOMIC SOCIAL INFORMATION AND POLICY ANALYSIS POPULATION DIVISION, UNITED NATIONS ECONOMIC SOCIAL INFORMATION AND POLICY ANALYSIS POPULATION DIVISION, . 1996. Levels and trends of contraceptive use. New York: UN.
Harvard
UNITED NATIONS E. S. I. A. P. A. P. D., UNITED NATIONS E. S. I. A. P. A. P. D., . (1996). Levels and trends of contraceptive use. New York: UN.
MLA
UNITED NATIONS ECONOMIC SOCIAL INFORMATION AND POLICY ANALYSIS POPULATION DIVISION, UNITED NATIONS ECONOMIC SOCIAL INFORMATION AND POLICY ANALYSIS POPULATION DIVISION, . Levels and trends of contraceptive use. New York: UN. 1996.