Masrifah, Masrifah, Agus Setiawan, Parlindungan Sinaga, and Wawan Setiawan. 2020. “An Investigation of Physics Teachers’ Multiple Representation Ability on Newton’s Law Concept”. Jurnal Penelitian & Pengembangan Pendidikan Fisika 6 (1):105-12. https://doi.org/10.21009/1.06112.