The Letter of Cyril to John of Antioch
- Called the Ephesine Creed, quotes the Formula of Reunion. Sanborn-Percival translation. From the Nicene and Post-Nicene Fathers of the Christian Church, second series, vol. 14.
- http://www.ccel.org/ccel/schaff/npnf214.xi.v.html

Formula of Union Between Cyril and John of Antioch; Letter of Cyril to John of Antioch About Peace
- Formula of Reunion, followed by the letter from which it has been extracted. Opening sections of letter severely abridged in this translation by Tanner. Emphasis inserted by persons unknown.
- http://www.dailycatholic.org/history/3ecumen3.htm#Formula of union between Cyrill and John of Antioch