Oughton, David, author
Black Stone Press Limited, 1997
Buku Teks
Leder, Malcolm, author
Pitman, 1996
Buku Teks
Shears, Peter, author
Pitman, 1991
Buku Teks
Leyland, Peter
Blackstone Press limited, 1999
Buku Teks
Thompson, Brian
Balckstone Press Limited, s.a.
Buku Teks