Rutter, William A., author
Gilbert Law Summaries, 1973
Buku Teks
Schwartz, Bernard, author
Little, Brown & Co., 1980
Buku Teks
Schuck, Peter H., author
Oxford University Press, 1994
Buku Teks
Friedmann, Wolfgang, 1907-1972, author
Melbourne University Press, 1950
Buku Teks
Brown, L. Neville (Lionel Neville), author
Clarendon Press, 1998
Buku Teks