BLACK, D. B. Farewell, Drop-Out: Hello, Drop-In. Canadian journal of higher education, [S. l.], v. 2, n. 1, p. 31–37, 1972. DOI: 10.47678/cjhe.v2i1.182550. Disponível em: https://cjhe-rces.ca/index.php/cjhe/article/view/182550. Acesso em: 23 feb. 2025.