Henkin, Louis, author
Martinus Nijhoff, 1995
Buku Teks
Spero, Joan Edelman, author
Routledge, 1994
Buku Teks
Reynolds, Charles, author
Martin Robertson, 1973
Buku Teks
Rourke, John T., author
McGraw-Hill, 2007
Buku Teks
Padelford, Norman J., author
Macmillan, 1962
Buku Teks