Rasdanu, R., R. A. . Hidayat, and N. . Albart. “Investment Analysis of ITMG and PTBA Stocks in 2024 Using the Modern Portfolio Theory Approach”. Eduvest - Journal of Universal Studies, vol. 5, no. 11, Nov. 2025, pp. 14068-7, doi:10.59188/eduvest.v5i11.51635.