Williams, Neville, author
Simon & Schuster , 1994
Buku Referensi
David F. Ford, Rachel Muers, editor
Blackwell Publishing, 2008
Buku Teks
Taschen, Laszio, edited
Taschen, 2010
Buku Referensi
Harcourt, Brace and company, 1950
Buku Teks
Lamm, Martin
Norwood Editions,, 1977
Buku Teks