Rizal, Mohamad Nor, Marsya Diah Izdihar, Nanda Wira Sampurna, dan Ferry Irawan. “Kinerja Keuangan Emiten Batubara Di Masa Pandemi Covid-19”. Jurnalku 2, no. 4 (Oktober 16, 2022): 379–395. Diakses Juli 18, 2026. https://jurnalku.org/index.php/jurnalku/article/view/288.