Faith, Vania Nur, and Eni Wuryani. “The Influence of Foreign Portfolio Investment and Public Ownership on Stock Price Volatility of Indonesian Energy Sector Companies (2021–2024)”. Surplus: Jurnal Ekonomi dan Bisnis 5, no. 1 (July 9, 2026): 352–366. Accessed November 9, 2026. https://yptb.org/index.php/sur/article/view/2233.