JPPPF, Editor. Front Matter JPPPF Volume 5 Issue 2, December 2019 . Jurnal Penelitian & Pengembangan Pendidikan Fisika, [S. l.], v. 5, n. 2, 2019. DOI: 10.21009/1.05200. Disponível em: https://journal.unj.ac.id/unj/index.php/jpppf/article/view/13547. Acesso em: 22 nov. 2024.