APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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