JPPPF, Editor. “Back Matter JPPPF Volume 4 Issue 2, December 2018”. Jurnal Penelitian & Pengembangan Pendidikan Fisika 4, no. 2 (December 31, 2018). Accessed April 21, 2025. http://103.8.12.212:33180/unj/index.php/jpppf/article/view/9850.