PÓŁTURZYCKI, J. Rok 2013. Rocznik Andragogiczny, [S. l.], v. 20, p. 559–564, 2014. DOI: 10.12775/RA.2013.060. Disponível em: https://apcz.umk.pl/RA/article/view/RA.2013.060. Acesso em: 17 lip. 2024.