ANA ALEXANDRA SILVA; HERMENEGILDO PINTO. Preserving the Umbundu Language. Global Journal of Human-Social Science, [S. l.], v. 23, n. G3, p. 59–68, 2023. Disponível em: https://socialscienceresearch.org/index.php/GJHSS/article/view/103656. Acesso em: 21 mar. 2025.