Bredero, A. (1994). Christendom and Christianity in the middle ages. William B. Eerdmans Publishing Company.
Chicago Style (17th ed.) ZitazioaBredero, Adriaan. Christendom and Christianity in the Middle Ages. Michigan: William B. Eerdmans Publishing Company, 1994.
MLA (9th ed.) ZitazioaBredero, Adriaan. Christendom and Christianity in the Middle Ages. William B. Eerdmans Publishing Company, 1994.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.