APA (7th ed.) Citation

John XXIII Pope & Chinigo, M. (1967). The teachings of Pope John XXIII. Harrap.

Chicago Style (17th ed.) Citation

John XXIII Pope and Michael Chinigo. The Teachings of Pope John XXIII. London: Harrap, 1967.

MLA (9th ed.) Citation

John XXIII Pope and Michael Chinigo. The Teachings of Pope John XXIII. Harrap, 1967.

Warning: These citations may not always be 100% accurate.