Tumanggor, A. M. R., Jumadi, J., Wilujeng, I. and Ringo, E. S. (2019) “The Profile of Students’ Physics Problem Solving Ability in Optical Instruments”, Jurnal Penelitian & Pengembangan Pendidikan Fisika, 5(1), pp. 29 - 40. doi: 10.21009/1.05104.