United Nations. Department of International Economic and Social Affairs. Population Division. (1991). Population growth and policies in mega-cities: Mexico City. United Nations.
Cita Chicago (17th ed.)United Nations. Department of International Economic and Social Affairs. Population Division. Population Growth and Policies in Mega-cities: Mexico City. New York: United Nations, 1991.
Cita MLA (9th ed.)United Nations. Department of International Economic and Social Affairs. Population Division. Population Growth and Policies in Mega-cities: Mexico City. United Nations, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.