JPPPF, Editor. “Front Matter JPPPF Volume 4 Issue 2, December 2018”. Jurnal Penelitian & Pengembangan Pendidikan Fisika 4, no. 2 (December 31, 2018). Accessed February 7, 2023. https://journal.unj.ac.id/unj/index.php/jpppf/article/view/9851.