Spektra, Editor. “BACK MATTER SPEKTRA VOLUME 2 NOMOR 1 APRIL 2017”. Spektra: Jurnal Fisika dan Aplikasinya 2, no. 1 (April 30, 2017). Accessed April 25, 2024. https://journal.unj.ac.id/unj/index.php/spektra/article/view/17661.