United Nations. Department of Economic and Social Affairs. Population Division. (2013). World population prospects 2013. United Nations.
Citazione stile Chigago Style (17a edizione)United Nations. Department of Economic and Social Affairs. Population Division. World Population Prospects 2013. New York: United Nations, 2013.
Citatione MLA (9a ed.)United Nations. Department of Economic and Social Affairs. Population Division. World Population Prospects 2013. United Nations, 2013.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.