House of Borgia (English Wikipedia)

Johann Burchard, Pope Alexander VI and His Court: Extracts from the Latin Diary of Johannes Burchardus, 1921, F.L. Glaser, ed., New York, N.L. Brown, pp. 154–155.[1]
Frederick Rolfe, The History of the Borgias (New York: Modern Library, 1931), 379–408.

books.google.com

In 5 volumes totaling nearly 3 thousand pages, and including many unpublished documents,* Msgr. de Roo labors to defend his thesis that Pope Alexander, far from being a monster of vice (as he has so often been portrayed) was, on the contrary, "a man of good moral character and an excellent Pope." Material, vol. 1, preface, xi. [2] [3]
* "[Peter de Roo] must have devoted to his task many years of research among the Vatican archives and elsewhere. As he tells us himself in a characteristic passage: "We continued our search after facts and proofs from country to country, and spared neither labour nor money in order to thoroughly investigate who was Alexander VI., of what he had been accused, and especially what he had done." Whether all this toil has been profitably expended is a matter upon which opinions are likely to differ. But we must in any case do Mgr. de Roo the justice of admitting that he has succeeded in compiling from original and often unpublished sources a much more copious record of the pontiff's creditable activities than has ever been presented to the world before." – Pope Alexander VI and His Latest Biographer, in The Month, April, 1925, Volume 145, p. 289.[4]

"Mariana de Borja y Córdoba". Ducal House of Medinaceli Foundation. Retrieved 4 July 2016.

In 5 volumes totaling nearly 3 thousand pages, and including many unpublished documents,* Msgr. de Roo labors to defend his thesis that Pope Alexander, far from being a monster of vice (as he has so often been portrayed) was, on the contrary, "a man of good moral character and an excellent Pope." Material, vol. 1, preface, xi. [2] [3]
* "[Peter de Roo] must have devoted to his task many years of research among the Vatican archives and elsewhere. As he tells us himself in a characteristic passage: "We continued our search after facts and proofs from country to country, and spared neither labour nor money in order to thoroughly investigate who was Alexander VI., of what he had been accused, and especially what he had done." Whether all this toil has been profitably expended is a matter upon which opinions are likely to differ. But we must in any case do Mgr. de Roo the justice of admitting that he has succeeded in compiling from original and often unpublished sources a much more copious record of the pontiff's creditable activities than has ever been presented to the world before." – Pope Alexander VI and His Latest Biographer, in The Month, April, 1925, Volume 145, p. 289.[4]

In 5 volumes totaling nearly 3 thousand pages, and including many unpublished documents,* Msgr. de Roo labors to defend his thesis that Pope Alexander, far from being a monster of vice (as he has so often been portrayed) was, on the contrary, "a man of good moral character and an excellent Pope." Material, vol. 1, preface, xi. [2] [3]
* "[Peter de Roo] must have devoted to his task many years of research among the Vatican archives and elsewhere. As he tells us himself in a characteristic passage: "We continued our search after facts and proofs from country to country, and spared neither labour nor money in order to thoroughly investigate who was Alexander VI., of what he had been accused, and especially what he had done." Whether all this toil has been profitably expended is a matter upon which opinions are likely to differ. But we must in any case do Mgr. de Roo the justice of admitting that he has succeeded in compiling from original and often unpublished sources a much more copious record of the pontiff's creditable activities than has ever been presented to the world before." – Pope Alexander VI and His Latest Biographer, in The Month, April, 1925, Volume 145, p. 289.[4]

Maclaine, David. "City of God by Cecelia Holland". Historicalnovels.info. Retrieved September 5, 2014.

"In a nutshell: the Borgias". History Revealed. Oct 2015. Archived from the original on 2021-07-27. Retrieved 2019-02-11.

Parypinski, Joanna (July 13, 2013). "Book Review: Summer of Night". joannaparypinski.com. Archived from the original on October 20, 2021. Retrieved April 17, 2021. When one of the boys uncovers the shrouded history of the Borgia Bell—an ancient relic connected with murder and said to be in the closed-off belfry of Old Central—the disturbances in town focus their attention on him.

Nadal Cañellas, Juan (2006). "La permanencia de Rodrigo de Borja (Alejandro VI) en el estudio de Bolonia, según documentos originales". Acta Histórica et Archaeologica Mediaevalia (in Spanish) (27–28). Barcelona: Universidad de Barcelona. Departamento de Historia Medieval: 173–205. ISSN 0212-2960.

"Borgia, Lucrezia" (US) and "Borgia, Lucrezia". Lexico UK English Dictionary. Oxford University Press. Archived from the original on 2022-08-26.
"In a nutshell: the Borgias". History Revealed. Oct 2015. Archived from the original on 2021-07-27. Retrieved 2019-02-11.
Parypinski, Joanna (July 13, 2013). "Book Review: Summer of Night". joannaparypinski.com. Archived from the original on October 20, 2021. Retrieved April 17, 2021. When one of the boys uncovers the shrouded history of the Borgia Bell—an ancient relic connected with murder and said to be in the closed-off belfry of Old Central—the disturbances in town focus their attention on him.

Nadal Cañellas, Juan (2006). "La permanencia de Rodrigo de Borja (Alejandro VI) en el estudio de Bolonia, según documentos originales". Acta Histórica et Archaeologica Mediaevalia (in Spanish) (27–28). Barcelona: Universidad de Barcelona. Departamento de Historia Medieval: 173–205. ISSN 0212-2960.

Horrible Histories – The Borgia Family | Horrible Songs | Radical Renaissance, 9 November 2019, retrieved 2021-12-21
Baker, Matt (April 8, 2023). "Borgia Family Tree" (video). Youtube.com. UsefulCharts.