Daryanto, Wiwiek Mardawiyah, and Sudarmawan Samidi. “A Financial Ratio Analysis of Oil and Gas Private Company in Indonesia: Before and After Declining the Oil Production”. International Journal of Business Studies 2, no. 2 (June 15, 2018): 74–83. Accessed March 3, 2026. https://ijbs.ipmi.ac.id/index.php/ijbs/article/view/55.