Catholic Church. Pope (1963-1978 : Paul VI) & Paul VI, P. (1969). Apostolic letter (issued motu proprio) approving the new Roman calendar: Mysterii Paschalis. United States Catholic Conference.
Cita Chicago Style (17a ed.)Catholic Church. Pope (1963-1978 : Paul VI) y Pope Paul VI. Apostolic Letter (issued Motu Proprio) Approving the New Roman Calendar: Mysterii Paschalis. [Washington, D.C.]: United States Catholic Conference, 1969.
Cita MLA (8a ed.)Catholic Church. Pope (1963-1978 : Paul VI) y Pope Paul VI. Apostolic Letter (issued Motu Proprio) Approving the New Roman Calendar: Mysterii Paschalis. United States Catholic Conference, 1969.
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