Mardiana, M.; Mardiati, M. The Influence of the Contextual Teaching and Learning (CTL) Model on the Mathematical Reasoning Abilities of Grade VII Students at SMP PAB 13 Stabat: Pengaruh Model Pembelajaran Contextual Teaching and Learning (CTL) Terhadap Kemampuan Penalaran Matematis Siswa Kelas VII SMP PAB 13 Stabat. COSMOS 2025, 2, 1045-1051.