Husein, Ismail, Machrani Adi Siregar, Arya Lubis, and Rima Aprilia. “Egarch Model Prediction for Sale Stock Price”. Jurnal Varian 6, no. 1 (November 13, 2022): 49 - 60. Accessed March 29, 2024. https://journal.universitasbumigora.ac.id/index.php/Varian/article/view/1975.