McPhee, Margaret, author
Allen & Unwin, 1993
Buku Referensi
Ingpen, Robert, author
Dragon's World, 1993
Buku Referensi
Dummer, Geoffrey William Arnold, author
Pergamon Press, 1983
Buku Teks
Eisen, Jonathan, author
Ufuk Press, 2010
Buku Teks
Oxford University press , 1994
Buku Teks