McPhee, Margaret, author
Allen & Unwin, 1993
Buku Referensi
Dummer, Geoffrey William Arnold, author
Pergamon Press, 1983
Buku Teks
Ingpen, Robert, author
Dragon's World, 1993
Buku Referensi
Oxford University press , 1994
Buku Teks
Jones, David J.
Second Back Row Press, 1981
Buku Teks