Simatupang, Taruli, und Oce Appulembang. „KEMAMPUAN BERPIKIR KRITIS SISWA KELAS VIII PADA PEMBELAJARAN MATEMATIKA MELALUI MODEL PEMBELAJARAN BERBASIS MASALAH [THE CRITICAL THINKING ABILITIES OF GRADE 8 MATHEMATICS STUDENTS USING THE PROBLEM-BASED LEARNING MODEL]“. JOHME: Journal of Holistic Mathematics Education 6, no. 2 (Dezember 5, 2022): 138–156. Zugegriffen November 20, 2025. https://ojs.uph.edu/index.php/JOHME/article/view/4726.