Harding, Andrew
Kluwer Law International, 1996
Buku Teks
Groves, Harry E.
Oceana Publications, 1967
Buku Teks
Hooker, M. B., author
Oxford University Press, 1976
Buku Teks
Ketelaar, J.A.A., author
Elsevier, 1958
Buku Teks
Basu, Durga Das,
Prentice Hall of India, 2007
Buku Teks