APA (7th ed.) Citation

Brackmann, A., & Kehr, P. F. (1911). Regesta Pontificum Romanorum. Weidmann.

Chicago Style (17th ed.) Citation

Brackmann, Albert, and Paul Fridolin Kehr. Regesta Pontificum Romanorum. Berolini: Weidmann, 1911.

MLA (9th ed.) Citation

Brackmann, Albert, and Paul Fridolin Kehr. Regesta Pontificum Romanorum. Weidmann, 1911.

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