Sitorus, Joy Juita Br, Gede Suweken, and I Made Ardana. 2026. “Pengaruh Model Pembelajaran Problem Based Learning Dengan Pendekatan Difrensiasi Terhadap Kemampuan Pemecahan Masalah Matematika Siswa SMP Kelas VII Pada Materi Perbandingan: The Influence of the Problem-Based Learning Model With a Differentiated Approach on the Mathematical Problem-Solving Ability of Seventh-Grade Junior High School Students in Proportions”. Citizen : Jurnal Ilmiah Multidisiplin Indonesia 6 (2):602-11. https://doi.org/10.53866/jimi.v6i2.1442.