Cita APA (7th ed.)

Riga, P. (1966). John XXIII and the city of man. Newman Press.

Cita Chicago (17th ed.)

Riga, Peter. John XXIII and the City of Man. Westminster, Md: Newman Press, 1966.

Cita MLA (9th ed.)

Riga, Peter. John XXIII and the City of Man. Newman Press, 1966.