GROŃ, R. Truth as gift. Studies in Medieval Cistercian History in honour of John R. Sommerfeldt, ed. Marsha L. Dutton - Daniel M. LaCorte - Paul Lockey, Kałamazoo Mich. 2004, Cistercian Publications, ss. 588. Vox Patrum, [S. l.], v. 48, p. 411–415, 2005. DOI: 10.31743/vp.8745. Disponível em: https://czasopisma.kul.pl/index.php/vp/article/view/8745. Acesso em: 2 may. 2024.