Jhonni Sinaga, Aurlia Hayatunisa, and Supriyanto Supriyanto. “Single Index Model Dalam Pemilihan Saham Optimal”. Sammajiva: Jurnal Penelitian Bisnis dan Manajemen 2, no. 3 (July 31, 2024): 135–154. Accessed September 19, 2024. https://e-journal.nalanda.ac.id/index.php/SAMMAJIVA/article/view/1190.