Corwin, Edward S.
Princeton University Press, 1944
Buku Teks
Kirgis, Frederic L.
West Publishing, 1993
Buku Teks
edited by Evan Luard
Praeger, 1966
Buku Teks
Peaslee, Amos J.
Martinus Nijhoff, 1956
Buku Teks
McCoubrey, Hilaire
Brookfield Dartmouth , 1995
Buku Teks