S. J. Hasibuan, T. R. B. Sipakkar, T. Helmira, M. F. N. Pardosi, and A. Anim, “Implementation of Problem Based Learning (PBL) Model to Increase Students’ Interest in Learning Spatial Building Material in Class VII of SMP Negeri 5 Kisaran”, HS, vol. 4, no. 3, pp. 483–487, Dec. 2024.