Ramadan, Eko Mhd, Jumadi Jumadi, and Dwi Ulan Rahmawati. 2020. “Physics Online Learning Devices Based on Guided Discovery Model for High School Class X on Momentum and Impulse Material”. Jurnal Penelitian & Pengembangan Pendidikan Fisika 6 (2):163-72. https://doi.org/10.21009/1.06203.