Oliver, Chad
Harper & Row , 1981
Buku Teks
Anderson, Bruce
Kluwer Law Publishers, 1996
Buku Teks
Arnold, David, author
Routledge, 1994
Buku Teks
Sharp, Andrew
Clarendon Press, 1963
Buku Teks
Keene, Donald, author
Stanford University Press, 1969
Buku Teks