Wilkes, Angela
Passport Books, 1987
Buku Teks
Wilkes, Angela
[date of publication not identified]
Buku Teks
Coultas, Barbara
Teach Yourself Books, 1990
Buku Teks
Bladon, Rachel
Passport Books, [Date of publication not identified]
Buku Teks
Aries, Angela
Hodder & Stoughton, 1994
Buku Teks