Chorley, Lord, author
Sir Isaac Pitman & Sons, 1960
Buku Teks
Hamblin, Clive, author
Sweet & Maxwell, 1985
Buku Teks
Bevan, H.K.
Butterworth, 1973
Buku Teks
Bell, Stuart, author
Blackstone Press, 2001
Buku Teks
Bell, Stuart, author
Blackstone Press , 2000
Buku Teks