^Joel Thomas Rosenthal, "The Training of an Elite Group: English Bishops in the Fifteenth Century" Transactions of the American Philosophical Society, New Series, 60.5 (1970:1–54) p. 7.
^name="HolyRoman">Miranda، Salvador. "Henry Beaufort". The Cardinals of the Holy Roman Church. مؤرشف من الأصل في 2017-12-11. اطلع عليه بتاريخ 2009-04-19.
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