Yeomans, Richard, author
Garnet, 2006
Buku Teks
Stierlin, Henri, author
Thames & Hudson, 2002
Buku Teks
Rice, David Talbot, author
Thames and Hudson, 1996
Buku Referensi
Hoag, John D., author
Faber, 1987
Buku Teks
Rodley, Lyn, author
Cambridge University Press, 1999
Buku Teks