Collins, Lawrence, author
Clarendon Press, 1994
Buku Teks
Nadelmann, Kurt H., author
Martinus Nijhoff, 1972
Buku Teks
Graveson, R.H.
Sweet & Maxwell, 1974
Buku Teks
Collier, John Greenwood, author
Cambridge University Press, 1987
Buku Teks
Hay, Peter, author
West Publishing, 1994
Buku Teks