(2009). World population prospects, Vol. 2., Sex and age distribution of the world population: The 2008 revision. United Nations.
Chicago-Zitierstil (17. Ausg.)World Population Prospects, Vol. 2., Sex and Age Distribution of the World Population: The 2008 Revision. New York: United Nations, 2009.
MLA-Zitierstil (9. Ausg.)World Population Prospects, Vol. 2., Sex and Age Distribution of the World Population: The 2008 Revision. United Nations, 2009.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.