Graveson, R.H.
Sweet & Maxwell, 1969
Buku Teks
Nadelmann, Kurt H., author
Martinus Nijhoff, 1972
Buku Teks
Palsson, Lennart, 1933-, author
Sijthoff, 1974
Buku Teks
under the general editorship of J.H.C. Morris, with specialist editors
Stevens: Sweet & Maxwell, 1949
Buku Teks
Ehrenzweig, Albert A., author
West Publishing, 1962
Buku Teks