^ 1.01.11.2Boorsch, Suzanne. The Building of the Vatican: The Papacy and Architecture. The Metropolitan Museum of Art Bulletin. 1982年–1983年, 40 (3): 4–8 (英语).请检查|date=中的日期值 (帮助)
^Marian Moffett, Michael Fazio, Lawrence Wodehouse. A World History of Architecture, 2nd edition 2008. : 135 (英语).
^Davis, Raymond. The Lives of the Ninth-Century Popes (Liber pontificalis). Liverpool University Press. 1995年: 96 (英语).
^Barbara Kreutz (1996). Before the Normans: Southern Italy in the Ninth and Tenth Centuries. University of Pennsylvania Press pp. 25–28.
^Rosemary Guiley, The Encyclopedia of Saints, (InfoBase Publishing, 2001), 208.
^William Tronzo. St. Peter's in the Vatican. Cambridge University Press. 2005: 16. ISBN 0-521-64096-2(英语).
^Garder, Helen; et al. Gardner's Art Through the Ages With Infotrac. Thomas Wadsworth. 2004年3月17日: 219. ISBN 0-15-505090-7(英语).
^Sobocinski, Melanie Grunow. Detroit and Rome. The Regents of the Univ of Michigan. 2005: 77. ISBN 0-933691-09-2(英语).
^Garder, Helen; et al. Gardner's Art Through the Ages With Infotrac. Thomas Wadsworth. 2004年3月17日: 619. ISBN 0-15-505090-7(英语).
^"Old Saint Peter's Basilica." Encyclopædia Britannica. 2006.
^Patetta, Federico. La figura del Bramante nel "Simia" d'Andrea Guarna. Roma: Accademia Nazionale dei Lincei. 1943 (意大利语).