APA (7th ed.) Citation

Gasquet, F. A., & Pius XI, P. (1922). His Holiness Pope Pius XI: A pen portrait. D. O'Connor.

Chicago Style (17th ed.) Citation

Gasquet, Francis Aidan, and Pope Pius XI. His Holiness Pope Pius XI: A Pen Portrait. London: D. O'Connor, 1922.

MLA (8th ed.) Citation

Gasquet, Francis Aidan, and Pope Pius XI. His Holiness Pope Pius XI: A Pen Portrait. D. O'Connor, 1922.