H. Sudarmadji, Y. . Sudaryo, N. A. . Sofiati, G. D. . Ismail, and R. N. . Sumawidjaja, “Comparative Analysis of Active and Passive Portfolios with the Single Index Model and Capital Asset Pricing Model in Indonesia: Policy Directions in the Capital Market”, JPRSP, vol. 5, no. 3, pp. 824-831, Sep. 2025.