JPPPF, Editor. “Back Matter JPPPF Volume 4 Issue 2, December 2018”. Jurnal Penelitian & Pengembangan Pendidikan Fisika 4, no. 2 (December 31, 2018). Accessed May 31, 2026. https://journal.unj.ac.id/unj/index.php/jpppf/article/view/9850.