Brouwer, Dede, author
Foris Publications, 1989
Buku Teks
Stimson, J. Frank, author
Martinus Nijhoff, 1964
Buku Referensi
Spiro, Socrates, bey, 1868-, compiler
Elias Modern Press, 1929
Buku Referensi
Pateman, Trevor
Clarendon Press , 1987
Buku Teks
Huebener, Theodore, author
New York University Press, 1967
Buku Teks