Groń, Ryszard. “John R. Sommerfeldt, Bernard of Clairvaux. On the Life of the Mind, New York - Mahwah NJ 2004, The Newman Press, Ss. 197”. Vox Patrum 48 (June 15, 2005): 418–420. Accessed December 13, 2025. https://czasopisma.kul.pl/index.php/vp/article/view/8749.