Melanie, Melanie, and Diah Febriyanti. “Influence Net Profit Margin, Debt to Equity Ratio, Return on Assets and Current Ratio Against Effective Tax Rate: (In Sub Sector Companies Coal Mining Companies Listed on the Indonesia Stock Exchange 2016-2023)”. International Journal of Community Service & Engagement 6, no. 1 (February 8, 2025): 24 - 47. Accessed October 8, 2026. https://www.journal.jis-institute.org/index.php/ijcse/article/view/2645.