Cita APA (7a ed.)

Sewell, B. (1970). The Vatican oracle. Duckwoth.

Cita Chicago Style (17a ed.)

Sewell, Brocard. The Vatican Oracle. London: Duckwoth, 1970.

Cita MLA (9a ed.)

Sewell, Brocard. The Vatican Oracle. Duckwoth, 1970.