Malik, Adam, Vitriani Vitriani, and Muhammad Minan Chusni. 2018. “Improving Students’ Critical-Thinking Skills Through Student Facilitator and Explaining Model in Momentum and Impulse Topic”. Jurnal Penelitian & Pengembangan Pendidikan Fisika 4 (2):55-64. https://doi.org/10.21009/1.04202.