Lovell, Colin Rhys
Oxford University Press, 1962
Buku Teks
Bagehot, Walter
Oxford University Press, 1977
Buku Teks
Holdsworth, William, Sir, author
Methuen, 1938
Buku Teks
Hanbury, Harold Grenville, author
Methuen, 1956
Buku Teks
Doe, Norman, author
Cambridge University Press, 1990
Buku Teks