MULA, Richard S. Learners’ Level of Difficulty in Using Mother Tongue-Based Instruction on Mathematics and Metrobank-MTAP-DepEd Math Challenge. International Journal of Multidisciplinary: Applied Business and Education Research, Malang, Indonesia, v. 6, n. 3, p. 1056–1067, 2025. DOI: 10.11594/ijmaber.06.03.07. Disponível em: https://ijmaberjournal.org/index.php/ijmaber/article/view/2185. Acesso em: 12 feb. 2026.