AMIN HARAHAP. Development Of Problem-Based Learning Device On Matrix Material For Class X Smk Kesehatan Imelda Rantauprapat. International Journal Of Humanities Education and Social Sciences, [S. l.], v. 2, n. 5, 2023. DOI: 10.55227/ijhess.v2i5.476. Disponível em: https://ijhess.com/index.php/ijhess/article/view/476. Acesso em: 9 nov. 2026.