Hermawan, Erwan, dan Widodo Wahyu Purwanto. “Gas Price Policy Analysis for Fertilizer Industries in Indonesia Based on Netback from Final Product”. Jurnal Sosial Humaniora, vol. 13, no. 2, Maret 2025, hlm. 190-02, https://journal.its.ac.id/index.php/jsh/article/view/2818.