Dede Resi Aristya, Nina Agustina, Tuan Hock Ng, and Chaerudin Manaf. “Analysis of Optimal Portfolio Formation Using the Single Index Model Approach on Bisnis-27 Index Shares on the Indonesia Stock Exchange for the 2018-2022 Period”. Issues and Perspectives in Business and Social Sciences (July 30, 2024): 178–186. Accessed October 22, 2024. https://mmupress.com/index.php/ipbss/article/view/iss4vol2paper5.