Erlande-Brandenburg, Alain
The cathedral builders of the middle ages/Alain Erlande-Brandenburg
Thames and Hudson, [date of publication not identified]
 Buku Teks
Curtius, Ernst Robert
European literature and the Latin middle ages Translated by
London Routledge & Kegan Paul [1953]
 Buku Teks
Curtius, Ernst Robert
European literature and the Latin middle ages / Ernst Robert Curtius; translated from the German by Willard R. Trasktranslation from the German by
Pantheon Books, 1953
 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