Cita APA (7a ed.)

Pastor, L., & Kerr, R. F. (1923). The history of the Popes: From the close of the Middle Ages. Herder Book.

Cita Chicago Style (17a ed.)

Pastor, Ludwig, y Ralph Francis Kerr. The History of the Popes: From the Close of the Middle Ages. St. Louis: Herder Book, 1923.

Cita MLA (9a ed.)

Pastor, Ludwig, y Ralph Francis Kerr. The History of the Popes: From the Close of the Middle Ages. Herder Book, 1923.