KESHAVARZ, M. H.; KHAMIS, M. AN INVESTIGATION INTO PRONUNCIATION PROBLEMS OF HAUSA-SPEAKING LEARNERS OF ENGLISH. International Online Journal of Education and Teaching, [S. l.], v. 4, n. 1, p. 61–72, 2017. Disponível em: https://iojet.org/index.php/IOJET/article/view/152. Acesso em: 25 dec. 2025.