"The Spirit of the Laws". Book by Baron de Montesquieu, Book XXV: Of Laws in Relation to the Establishment of Religion and its External Polity, Ch. 2: Of the Motives of Attachment to Different Religions, 1748.
Pope John Paul II (2003). “The Eucharist in the life of the church: encyclical letter of Pope John Paul II, Ecclesia de eucharistia, with three presentations from the 3rd Nigerian National Eucharistic Congress, Ibadan, November 15-17, 2002”
Galileo Galilei, Johannes Kepler (2016). “The Sidereal Messenger of Galileo Galilei and a Part of the Preface to Kepler's Dioptrics Containing the Original Account of Galileo's Astronomical Discoveries”, p.30, Library of Alexandria