KANIA, Witold. Etyka bez religii?. Śląskie Studia Historyczno-Teologiczne, [S. l.], v. 40, n. 1, p. 254–256, 2007. Disponível em: https://journals.us.edu.pl/index.php/ssht/article/view/17255. Acesso em: 5 grudz. 2025.