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Rahmawati, N.; Azizah, A.; Salsabila, N.; Sholehatennafiah, V.; Fadah, H. I.; Safitri, R.; Kaneishia, S.; Mayasari, S.; Mahmudyah, N. N.; Subiki. Problem-Based Learning (PBL) Physics Teaching Books Newton’s Gravity Force. amplitudo 2024, 3, 9-14.