New York The Population Council 1995,
Buku Teks
United Nations Population Fund; edited by Reed Boland
United Nations Population Fund and Harvard Law School Library , 1986
Buku Teks
UNESCO, 1974
Buku Teks
Badan Pengkajian dan Penerapan Teknologi, 2009
Buku Teks
Wageningen The Institute , 1979
Buku Teks