Design Media Publishing Limited, [date of publication not identified]
Buku Referensi
Dooley, Susan, author
Chronicle Books, 2001
Buku Referensi
Balston, Michael, author
Rockport Publishers, 2001
Buku Teks
Rees, Yvonne, author
Page One Publishing, 2001
Buku Referensi
Brookes, John, author
Ward Lock, 1996
Buku Referensi