United Nations Department of International Economic and Social Affairs. (1989). Projection methods for integrating population variables into development planning. United Nations.
Cita Chicago (17th ed.)United Nations Department of International Economic and Social Affairs. Projection Methods for Integrating Population Variables into Development Planning. New York: United Nations, 1989.
Cita MLA (9th ed.)United Nations Department of International Economic and Social Affairs. Projection Methods for Integrating Population Variables into Development Planning. United Nations, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.