Sitorus, J. J. B., Suweken, G. . and Ardana, I. M. . (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), pp. 602–611. doi: 10.53866/jimi.v6i2.1442.