LUBIS, Azmil Hasan. Effect of Problem-Based Learning Approach on Elementary School Students’ Critical Thinking Skills in Mathematics Learning. Journal of Indonesian Primary School, [S. l.], v. 2, n. 3, p. 98–109, 2025. Disponível em: https://journal.mgedukasia.or.id/index.php/jips/article/view/801. Acesso em: 13 nov. 2025.