McColvin, Eric
London
Longmans, Green and Co., 1946
 Buku Teks SO
Gluck, Peter L.
The houses
Rockport Publishers, 1997
 Buku Teks SO
Marcucci, Luisa
Medieval painting
Studio Books , 1960
 Buku Referensi
Hoffman, Ross J.S.
Medieval history
Littlefield, Adams, 1958
 Buku Teks SO
Medieval age
edited by Angel Flores
Dell Publishing, 1963
 Buku Teks SO