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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'Papal Chronology', 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://prod.british-history.ac.uk/cal-papal-registers/brit-ie/vol12/xv [accessed 28 April 2025].
'Papal Chronology', 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 April 28, 2025, https://prod.british-history.ac.uk/cal-papal-registers/brit-ie/vol12/xv.
"Papal Chronology". Calendar of Papal Registers Relating To Great Britain and Ireland: Volume 12, 1458-1471. Ed. J A Twemlow (London, 1933), British History Online. Web. 28 April 2025. https://prod.british-history.ac.uk/cal-papal-registers/brit-ie/vol12/xv.