Longosz, Stanisław. “Ks. Roman Ryszard Piętka MIC (7 XI 1937 - 26 III 2011)”. Vox Patrum 56 (December 15, 2011): 999–1001. Accessed March 28, 2024. https://czasopisma.kul.pl/index.php/vp/article/view/4307.