Hoyt, Robert S.
Europe in the middle ages
Harcourt, Brace & World, 1966
 Buku Teks
Baring-Gould, Sabine
Curious myths of the middle ages
Longman, 1906
 Buku Teks
The Middle Ages : a concise encyclopaedia
general editor, H.R. Loyn
Thames and Hudson, 1991
 Buku Referensi
Huizinga, Johan
waning of the middle ages
New York: Doubleday, 1956
 Buku Teks
Salzman, L.F.
English life in the middle ages
Oxford University Press, 1955
 Buku Teks