APA

Catholic Church. Pope (1963-1978 : Paul VI), . (1965). Encyclical letter (Mysterium Fidei) of His Holiness Paul VI by Divine Providence Pope to our venerable brothers ... concerning the doctrine and worship of the Holy Eucharist. London: Catholic Truth Society.

Chicago

Catholic Church. Pope (1963-1978 : Paul VI), . 1965. Encyclical letter (Mysterium Fidei) of His Holiness Paul VI by Divine Providence Pope to our venerable brothers ... concerning the doctrine and worship of the Holy Eucharist. London: Catholic Truth Society.

Harvard

Catholic Church. Pope (1963-1978 : Paul VI), . (1965). Encyclical letter (Mysterium Fidei) of His Holiness Paul VI by Divine Providence Pope to our venerable brothers ... concerning the doctrine and worship of the Holy Eucharist. London: Catholic Truth Society.

MLA

Catholic Church. Pope (1963-1978 : Paul VI), . Encyclical letter (Mysterium Fidei) of His Holiness Paul VI by Divine Providence Pope to our venerable brothers ... concerning the doctrine and worship of the Holy Eucharist. London: Catholic Truth Society. 1965.