APA

Catholic Church, . (1954). Encyclical letter (Ad Caeli Reginam) of His Holiness Pius XII: on the royal dignity of the Blessed Virgin Mary and the establishment of a feast thereof. London: Catholic Truth Society.

Chicago

Catholic Church, . 1954. Encyclical letter (Ad Caeli Reginam) of His Holiness Pius XII: on the royal dignity of the Blessed Virgin Mary and the establishment of a feast thereof. London: Catholic Truth Society.

Harvard

Catholic Church, . (1954). Encyclical letter (Ad Caeli Reginam) of His Holiness Pius XII: on the royal dignity of the Blessed Virgin Mary and the establishment of a feast thereof. London: Catholic Truth Society.

MLA

Catholic Church, . Encyclical letter (Ad Caeli Reginam) of His Holiness Pius XII: on the royal dignity of the Blessed Virgin Mary and the establishment of a feast thereof. London: Catholic Truth Society. 1954.