APA (7th ed.) Citation

Pius XII, p. (1956). Epistula Apostolica. Typis Poliglottis.

Chicago Style (17th ed.) Citation

Pius XII, papa. Epistula Apostolica. Vaticanis: Typis Poliglottis, 1956.

MLA (9th ed.) Citation

Pius XII, papa. Epistula Apostolica. Typis Poliglottis, 1956.

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