Calendar of Papal Registers Relating To Great Britain and Ireland: Volume 12, 1458-1471. Originally published by His Majesty's Stationery Office, London, 1933.
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'Bibliography', in Calendar of Papal Registers Relating To Great Britain and Ireland: Volume 12, 1458-1471, ed. J A Twemlow (London, 1933), British History Online https://www.british-history.ac.uk/cal-papal-registers/brit-ie/vol12/xiii-xiv [accessed 3 May 2025].
'Bibliography', in Calendar of Papal Registers Relating To Great Britain and Ireland: Volume 12, 1458-1471. Edited by J A Twemlow (London, 1933), British History Online, accessed May 3, 2025, https://www.british-history.ac.uk/cal-papal-registers/brit-ie/vol12/xiii-xiv.
"Bibliography". Calendar of Papal Registers Relating To Great Britain and Ireland: Volume 12, 1458-1471. Ed. J A Twemlow (London, 1933), British History Online. Web. 3 May 2025. https://www.british-history.ac.uk/cal-papal-registers/brit-ie/vol12/xiii-xiv.