United Nations. Department of Economic and Social Affairs. (2007). World economic and social survey 2007: Development in an ageing world. United Nations.
Citazione stile Chigago Style (17a edizione)United Nations. Department of Economic and Social Affairs. World Economic and Social Survey 2007: Development in an Ageing World. New York: United Nations, 2007.
Citatione MLA (9a ed.)United Nations. Department of Economic and Social Affairs. World Economic and Social Survey 2007: Development in an Ageing World. United Nations, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.