Artikel Jurnal
Garland, Paul Griffith, author
Parker School of Foreign and Comparative Law, Columbia University, by Oceana Publications, 1959. , 1959
Buku Teks
Klooster, H.A.J., author
KITLV Press, 1997
Buku Teks
Stuart-Fox, David J., author
KITLV Press, 1992
Buku Referensi
Artikel Jurnal