Mellor, J. Leigh
Teach Yourself Books, 1976
Buku Teks
Declareuil, J.
Kegan Paul, 1927
Buku Teks
Jones, John Walter, 1892-1973
At The Clarendon Press, 1956
Buku Teks
Allen, Michael J., author
Blackstone, 1995
Buku Teks
Allen, Michael J., author
Blackstone Press , 1999
Buku Teks