Office of The Coordinating Minister for Social Welfare and Poverty Alleviation, 1998
Buku Referensi
Kahin, George McTurnan
Cornell University Press, 1956
Buku Teks
Seltzer, William
The population council, 1973
Buku Teks
Population Institute East-West Center, 1987
Majalah, Jurnal, Buletin
Population Institute, 1987
Majalah, Jurnal, Buletin