Bradbrook, Adrian J., author
The Law Book Company Limited, 1991
Buku Teks
Bernhardt, Roger, author
West Publishing, 1993
Buku Teks
Burby, William Edward, 1893-, author
West Publishing, 1954
Buku Teks
Lawson, F.H., author
Clarendon Press, 1958
Buku Teks
Boyer, Ralph E., author
St. Paul Minn, 1991
Buku Teks