Arnold, C. (2015). Pius IX., Papst. Religion in Geschichte und Gegenwart online. doi:10.1163/2405-8262_rgg4_SIM_124395
Chicago Style (17th ed.) CitationArnold, Claus. "Pius IX., Papst." Religion in Geschichte Und Gegenwart Online 2015, https://doi.org/10.1163/2405-8262_rgg4_SIM_124395.
MLA (8th ed.) CitationArnold, Claus. "Pius IX., Papst." Religion in Geschichte Und Gegenwart Online, 2015, https://doi.org/10.1163/2405-8262_rgg4_SIM_124395.
Warning: These citations may not always be 100% accurate.