APA (7th ed.) Citation

Iglesia Católica & Sickel, T. E. v. (1966). Liber diurnus Romanorum Pontificum. Scientia.

Chicago Style (17th ed.) Citation

Iglesia Católica and Theodor E. von Sickel. Liber Diurnus Romanorum Pontificum. Aalen: Scientia, 1966.

MLA (9th ed.) Citation

Iglesia Católica and Theodor E. von Sickel. Liber Diurnus Romanorum Pontificum. Scientia, 1966.

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