Janis, Mark W., author
Little, Brown , 1993
Buku Teks
Lewis, Merlin, author
Prentice-Hall, 1978
Buku Teks
Klabbers, Jan, author
Cambridge University Press, 2009
Buku Teks
Klabbers, Jan, author
Cambridge University Press, 2002
Buku Teks
Kennedy, Charles H., author
Artech House, 1996
Buku Teks