Hopkins, Andrew, author
Thames & Hudson, 2002
Buku Teks
Papini, Giovanni
Dutton, 1952
Buku Teks
Bradbury, Kirsten, author
Parragon Book, 2001
Buku Referensi
Christopher, Paul, author
Dastan Books, 2006
Buku Teks
Bradbury, Kirsten
Bath Parragon 2001,
Buku Referensi