Spektra, Editor. “FRONT MATTER SPEKTRA VOLUME 5 ISSUE 2, AUGUST 2020”. Spektra: Jurnal Fisika dan Aplikasinya 5, no. 2 (August 31, 2020). Accessed April 20, 2024. https://journal.unj.ac.id/unj/index.php/spektra/article/view/17002.