Benedikt, X. (2008). Apostolic Letter Summorum Pontificum July 7, 2007. Philippine canonical forum, 10, 49-58.
芝加哥风格引文Benedikt, XVI. "Apostolic Letter Summorum Pontificum July 7, 2007." Philippine Canonical Forum 10 (2008): 49-58.
MLA引文Benedikt, XVI. "Apostolic Letter Summorum Pontificum July 7, 2007." Philippine Canonical Forum, vol. 10, 2008, pp. 49-58.
警告:这些引文格式不一定是100%准确.