Source: Pope St. John Paul II, DOMINICAE CENAE (LETTER DOMINICAE CENAE OF THE SUPREME PONTIFF JOHN PAUL II TO ALL THE BISHOPS OF THE CHURCH ON THE MYSTERY AND WORSHIP OF THE EUCHARIST), 2/24/1980
Source: Pope St. John Paul II, DOMINICAE CENAE (LETTER DOMINICAE CENAE OF THE SUPREME PONTIFF JOHN PAUL II TO ALL THE BISHOPS OF THE CHURCH ON THE MYSTERY AND WORSHIP OF THE EUCHARIST), 2/24/1980