Office of The Coordinating Minister for Social Welfare and Poverty Alleviation, 1998
Buku Referensi
by United Nations
United Nations, 1993
Buku Teks
United Nations Population Fund; edited by Reed Boland
United Nations Population Fund and Harvard Law School Library , 1986
Buku Teks
Corpuz, Onofre
Prentice-Hall, 1965
Buku Teks
Buku Teks