TOMBANG, S. . MENINGKATKAN HASIL BELAJAR MATEMATIKA MELALUI METODE PROBLEM BASED INSTRUCTION DI KELAS X SMK NEGERI 1 TANJUNG PALAS TAHUN 2017/2018. VOCATIONAL: Jurnal Inovasi Pendidikan Kejuruan , [S. l.], v. 1, n. 3, p. 180-184, 2021. DOI: 10.51878/vocational.v1i3.468. Disponível em: https://www.jurnalp4i.com/index.php/vocational/article/view/468. Acesso em: 11 mar. 2026.