Cunningham, James P., author
Kogan Page, 1973
Buku Teks
Blanchet, Therese
Clarendon Press, 1994
Buku Teks
Pescatore, Pierre
A.W. Sijthoff, 1974
Buku Teks
Brinkhorst, L. J., author
Kluwer Law & Taxation Publishers, 1969
Buku Teks
Hauser, Rita E.
Oceana Publication , 1960
Buku Teks