MENTZ, E.; DE BEER, J. J. Cultural-Historical Activity Theory as a lens in mixed methods research on self-directed learning. South African Journal of Higher Education, [S. l.], v. 35, n. 5, p. 163–183, 2021. DOI: 10.20853/35-5-4364. Disponível em: https://www.journals.ac.za/sajhe/article/view/4364. Acesso em: 7 oct. 2025.