general editor, H.R. Loyn
Thames and Hudson, 1991
Buku Referensi
Painter, Sidney
Alfred A. Knopf, 1961
Buku Teks
Turville-Petre, Thorlac, author
Blackwell Publishing, 2007
Buku Teks
Chaunu, Pierre
North-Holland Publishing Co., 1979
Buku Teks
De Wulf, Maurice
Dover Publications, Inc., 1922
Buku Teks