Intal, P. S. (1989). Population, welfare, and rural development. Population/Development Planning and Research Project, National Economic and Development Authority.
Cita Chicago (17th ed.)Intal, Ponciano S. Population, Welfare, and Rural Development. [Manila]: Population/Development Planning and Research Project, National Economic and Development Authority, 1989.
Cita MLA (9th ed.)Intal, Ponciano S. Population, Welfare, and Rural Development. Population/Development Planning and Research Project, National Economic and Development Authority, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.