PRÓSINOWSKI, Piotr; KRZYWDZIŃSKI, Piotr. Wprowadzenie. Ars Educandi, [S. l.], n. 12, p. 5–8, 2015. Disponível em: https://czasopisma.bg.ug.edu.pl/index.php/arseducandi/article/view/1900. Acesso em: 4 grudz. 2024.