Mustofa Z, Sutopo S, Mufti N, Asmichatin A. The Impact of Modeling Instruction Based on System Toward Work-Energy Concept Understanding. jpppf [Internet]. 2019 Nov. 8 [cited 2024 Dec. 31];5(2):145-54. Available from: https://journal.unj.ac.id/unj/index.php/jpppf/article/view/10244