ZAKREVSKA, S. QUALITY ASSURANCE OF NON-FORMAL ADULT EDUCATION DEVELOPMENT. Continuing Professional Education: Theory and Practice, [S. l.], n. 3-4, p. 125–129, 2019. DOI: 10.28925/1609-8595.2017(3-4)125129. Disponível em: http://npo.kubg.edu.ua/article/view/182143. Acesso em: 4 aug. 2021.