Cita APA (7a ed.)

Hughes, J. J. (1994). Pontiffs: Popes who shaped history. Our Sunday Publishing Division.

Cita Chicago Style (17a ed.)

Hughes, John Jay. Pontiffs: Popes Who Shaped History. Huntington, Indiana: Our Sunday Publishing Division, 1994.

Cita MLA (9a ed.)

Hughes, John Jay. Pontiffs: Popes Who Shaped History. Our Sunday Publishing Division, 1994.