Ramadan, E. M., Jumadi, J., & Rahmawati, D. U. (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 - 172. https://doi.org/10.21009/1.06203