Cita APA (7a ed.)

Martin, M. (1972). Three Popes and the Cardinal. Popular Libray.

Cita Chicago Style (17a ed.)

Martin, Malachi. Three Popes and the Cardinal. New York: Popular Libray, 1972.

Cita MLA (9a ed.)

Martin, Malachi. Three Popes and the Cardinal. Popular Libray, 1972.