Spektra, Editor. “FRONT MATTER SPEKTRA VOLUME 6 ISSUE 3, DECEMBER 2021 ”. Spektra: Jurnal Fisika dan Aplikasinya 6, no. 3 (December 30, 2021). Accessed April 19, 2025. http://103.8.12.212:33180/unj/index.php/spektra/article/view/25469.