TAMBAUM, T. Elderly learners in combined-age learning groups picking up on new professional skills. Rocznik Andragogiczny, [S. l.], v. 21, p. 297–314, 2015. DOI: 10.12775/RA.2014.022. Disponível em: https://apcz.umk.pl/RA/article/view/RA.2014.022. Acesso em: 26 kwi. 2024.