UMIASTOWSKI, J. Skromny i serdeczny. Ethos. Kwartalnik Instytutu Jana Pawła II KUL, [S. l.], v. 24, n. 3 (95), p. 281–282, 2011. Disponível em: https://czasopisma.kul.pl/index.php/ethos/article/view/6036. Acesso em: 2 sty. 2026.