“PENINGKATAN HASIL BELAJAR SISWA PADA PEMBELAJARAN FISIKA MATERI POKOK GELOMBANG MELALUI PENERAPAN MODEL PROBLEM BASED LEARNING (PBL) PADA KELAS XI SMA YPPK TERUNA BAKTI”, Sindoro, vol. 18, no. 2, pp. 1241–1250, Dec. 2025, Accessed: Oct. 03, 2026. [Online]. Available: https://cibjournal.com/index.php/sindoro/article/view/3358