TWARDOWSKI, Bolesław. Listy pasterskie z lat 1923-1939. Poland: Księgarnia Akademicka Publishing,2022. v. Historia, Hereditas, Ecclesia, Vol. 19 DOI: 10.12797/9788381386630. Disponível em: https://books.akademicka.pl/publishing/catalog/book/389. Acesso em: 1 jun. 2025.