APA (7th ed.) Citation

Catholic Church. Pope & Pius X, P. (1905). PII X Pontificis Maximi acta. Ex Typographia Vaticana.

Chicago Style (17th ed.) Citation

Catholic Church. Pope and Pope Pius X. PII X Pontificis Maximi Acta. Romae: Ex Typographia Vaticana, 1905.

MLA (8th ed.) Citation

Catholic Church. Pope and Pope Pius X. PII X Pontificis Maximi Acta. Ex Typographia Vaticana, 1905.