APA
United Nations D. o. E. a. S. A., . (2007). World economic and social survey, 2007: Development in an ageing world. New Delhi: Academic Foundation.
Chicago
United Nations Department of Economic and Social Affairs, . 2007. World economic and social survey, 2007: Development in an ageing world. New Delhi: Academic Foundation.
Harvard
United Nations D. o. E. a. S. A., . (2007). World economic and social survey, 2007: Development in an ageing world. New Delhi: Academic Foundation.
MLA
United Nations Department of Economic and Social Affairs, . World economic and social survey, 2007: Development in an ageing world. New Delhi: Academic Foundation. 2007.