Coba jelasin Bacaan tambahan dari Kekristenan pada abad ke-8 dong

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Kaplan, Steven 1984 Monastic Holy Man and the Christianization of Early Solomonic Ethiopia (in series Studien zur Kulturkunde)

Fletcher, Richard, The Conversion of Europe. From Paganism to Christianity 371-1386 AD. London 1997.

Padberg, Lutz v., (1998): Die Christianisierung Europas im Mittelalter, Stuttgart, Reclam (German)