United Nations. Population Division. (2009). World population prospects: The 2008 revision. United Nations.
Cita Chicago Style (17a ed.)United Nations. Population Division. World Population Prospects: The 2008 Revision. New York: United Nations, 2009.
Cita MLA (8a ed.)United Nations. Population Division. World Population Prospects: The 2008 Revision. United Nations, 2009.
Precaución: Estas citas no son 100% exactas.