Cita APA (7th ed.)

Fremantle, A. (1956). The papal encyclicals in their historical context. A Mentor Book.

Cita Chicago (17th ed.)

Fremantle, Anne. The Papal Encyclicals in Their Historical Context. New York: A Mentor Book, 1956.

Cita MLA (9th ed.)

Fremantle, Anne. The Papal Encyclicals in Their Historical Context. A Mentor Book, 1956.