Spektra, Editor. “FRONT MATTER SPEKTRA VOLUME 5 ISSUE 3, DECEMBER 2020 ”. Spektra: Jurnal Fisika dan Aplikasinya 5, no. 3 (December 31, 2020). Accessed April 19, 2024. https://journal.unj.ac.id/unj/index.php/spektra/article/view/18297.