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 (IJHESS) , [S. l.], v. 2, n. 5, 2023. DOI: 10.55227/ijhess.v2i5.476. Disponível em: http://ijhess.com/index.php/ijhess/article/view/476. Acesso em: 30 apr. 2026.