White, Lynn
Medieval technology and social change
Oxford University Press, 1962
 Buku Teks SO
Sarkar, Amal
Siva in medieval Indian literature
Punthi Pustak, 1974
 Buku Teks
Watt, William Montgomery
The majesty that was islam: the islamic world 661-1100
Sidwick and Jackson, 1976
 Buku Teks
In the spirit of chaucer : young medieval women in karen cusman's novels
 Artikel Jurnal
Coulton, G.G. (George Gordon)
Medieval panorama; the English scene from conquest to reformation
Macmillan; University Press, 1938
 Buku Teks SO