JPPPF, Editor. Front Matter JPPPF Volume 7 Issue 2, December 2021. Jurnal Penelitian & Pengembangan Pendidikan Fisika, [S. l.], v. 7, n. 2, 2021. DOI: 10.21009/1.07200. Disponível em: https://journal.unj.ac.id/unj/index.php/jpppf/article/view/25082. Acesso em: 24 nov. 2024.