KHO, Ronaldo; SOLIHATI, Titi; LUMBANTOBING, Happy. The impact of problem-based learning on motivation and mathematics outcome for sixth-grade students. Journal of Honai Math, [S. l.], v. 7, n. 3, p. 363–378, 2024. DOI: 10.30862/jhm.v7i3.693. Disponível em: https://journalfkipunipa.org/index.php/jhm/article/view/693. Acesso em: 11 may. 2026.