Spektra, Editor. “FRONT MATTER SPEKTRA VOLUME 2 NOMOR 3 DESEMBER 2017”. Spektra: Jurnal Fisika dan Aplikasinya 2, no. 3 (December 30, 2017): i - ix. Accessed May 20, 2026. https://journal.unj.ac.id/unj/index.php/spektra/article/view/5767.