Groenendael, Victoria M. Clara van, author
Foris Publications, 1987
Buku Referensi
Viet, Jean, author
United Nations, 1961
Buku Teks
Clamp, Cynthia G. L., author
Sage, 1999
Buku Teks
The Japan Foundation, 1974
Buku Teks
Polman, Katrien
The Hague Martinus Nijhoff, 1981
Buku Referensi