Yulita, S., Situmorang, A. S., Panjaitan, S. M., & Manik, E. (2023). Pengaruh Model Problem Based Learning (Pbl) Terhadap Kemampuan Berpikir Tingkat Tinggi Matematis Siswa Pada Soal Materi Aritmatika Sosial Di Kelas VII SMPNegeri 14 Medan T.A. 2022/2023. Innovative: Journal Of Social Science Research, 3(2), 1022–1037. Retrieved from https://j-innovative.org/index.php/Innovative/article/view/401