Lubis, Irda Auliya Hadi, Nurul Choriah Tumanggor, Hikmah Fazariah, Lina Yana Nababan, and Siti Salamah Br. Ginting`. “Studi Literatur: Penggunaan Model Problem Based Learning Dalam Meningkatkan Hasil Belajar Matematika Pada Materi Program Linear ”. Kognitif: Jurnal Riset HOTS Pendidikan Matematika 4, no. 1 (June 30, 2024): 174–182. Accessed April 30, 2025. https://etdci.org/journal/kognitif/article/view/836.