Gaya APA

XI, P. (1960). The Catholic priesthood: Encyclical letter of Pope Pius XI Ad Catholici Sacerdotii', 1935. . London: London Catholic Truth Society.

Gaya MLA

XI, Pius. "The Catholic priesthood: Encyclical letter of Pope Pius XI Ad Catholici Sacerdotii', 1935. ". London: London Catholic Truth Society, 1960. Buku.