APA (7th ed.) Citation

United Nations. Department of Economic and Social Affairs. Population Division. (2009). Population ageing and development. United Nations.

Chicago Style (17th ed.) Citation

United Nations. Department of Economic and Social Affairs. Population Division. Population Ageing and Development. New York, N.Y.: United Nations, 2009.

MLA (9th ed.) Citation

United Nations. Department of Economic and Social Affairs. Population Division. Population Ageing and Development. United Nations, 2009.