Leyland, Peter
Blackstone Press limited, 1999
Buku Teks
Thompson, Brian
Balckstone Press Limited, s.a.
Buku Teks
Davies, Michael
Blackstone Press limited, 1996
Buku Teks
Dixon, Martin
Blackstone Press limited, 2000
Buku Teks
Steiner, Josephine
Blackstone Press, 1998
Buku Teks