Wilhide, Elizabeth, author
Conran Octopus, 1998
Buku Referensi
Encarna Castillo, editor
Harper Design International, 2003
Buku Referensi
Whately, Alice, author
Pageone, 2002
Buku Referensi
Cuito, Aurora, author
Loft Publications S.L and HBI, 2002
Buku Teks
Beazley, Mitchell, author
Reed Consumer Books, 1990
Buku Referensi