APA (7th ed.) Citation

Pius XII, P. (1958). Schism in China: The encyclical Ad apostolorum principis of Pope Pius XII. Sword of the Spirit.

Chicago Style (17th ed.) Citation

Pius XII, Pope. Schism in China: The Encyclical Ad Apostolorum Principis of Pope Pius XII. London, England: Sword of the Spirit, 1958.

MLA (8th ed.) Citation

Pius XII, Pope. Schism in China: The Encyclical Ad Apostolorum Principis of Pope Pius XII. Sword of the Spirit, 1958.