↑F. Donald Logan A history of the church in the Middle Ages Page 10 2002 "It was later to be summed up in the Athanasian Creed: Ita deus pater, deus filius, deus spiritus sanctus, Et tamen non tres dii, sed unus est deus. (Thus, God the Father, God the Son, God the Holy Spirit, Yet not three gods but one God."
↑Luigi Gioia The theological epistemology of Augustine's De Trinitate 2008 "... the obedience of Christ on the cross is the obedience of God the Son to God the Father: 'what greater example of obedience' ... exemplum qui per inobedientiam perieramus quam deo patri deus filius obediens usque ad mortem crucis?"
↑The Augsburg Confession: a commentary Leif Grane, John H. Rasmussen – 1987 "GT: "Dass Gott der Sohn sei Mensch worden, geborn aus der reinen Jungfrauen Maria" (that God the Son became man, born of the virgin Mary)."