AQUINAS, St. Thomas. 1947. Summa Theologica. [online]. Dostupné na internete <http://www.sacred-texts.com/chr/aquinas/summa/>.
AQUINAS, St. Thomas. 1947. Summa Theologica. [online]. Dostupné na internete <http://www.sacred-texts.com/chr/aquinas/summa/>.