Sofiah, Gina Saila, et al. “Pengaruh Total Operating Expenses Dan Income Tax Expense Terhadap Net Income for The Year Pada PT. Indocement Tunggal Prakasa Tbk. Periode 2010-2019”. Eco-Iqtishodi: Jurnal Ilmiah Ekonomi Dan Keuangan Syariah, vol. 2, no. 2, Jan. 2021, pp. 75-88, http://ojs.ikopin.ac.id/ecoiqtishodi/article/view/253.