APA (7th ed.) Citation

Pius IX, p. (1857). Pii IX Pontificis Maximi Acta. Belle Arti.

Chicago Style (17th ed.) Citation

Pius IX, papa. Pii IX Pontificis Maximi Acta. Roma: Belle Arti, 1857.

MLA (9th ed.) Citation

Pius IX, papa. Pii IX Pontificis Maximi Acta. Belle Arti, 1857.

Warning: These citations may not always be 100% accurate.