Catholic Church. Congregatio pro Cultu Divino & Paul VI, P. (1971). Notification on the Roman Missal, the Liturgy of the Hours, and the Calendar: Apostolic Constitution by which the Divine Office restored according to the decrees of the second vatican ecumenical council is promulgated. Priests of the Sacred Heart.

Catholic Church. Congregatio pro Cultu Divino and Pope Paul VI. Notification on the Roman Missal, the Liturgy of the Hours, and the Calendar: Apostolic Constitution by Which the Divine Office Restored According to the Decrees of the Second Vatican Ecumenical Council Is Promulgated. [Hales Corners, Wis.: Priests of the Sacred Heart, 1971.

Catholic Church. Congregatio pro Cultu Divino and Pope Paul VI. Notification on the Roman Missal, the Liturgy of the Hours, and the Calendar: Apostolic Constitution by Which the Divine Office Restored According to the Decrees of the Second Vatican Ecumenical Council Is Promulgated. Priests of the Sacred Heart, 1971.