Claransia, S. O., and T. Sugiharto. “Performance Analysis of Stock Portfolios Incorporated in IDX30 Using the Sharpe, Treynor and Jensen Method in 2016-2020 ”. Enrichment : Journal of Management, Vol. 12, no. 1, Aug. 2021, pp. 236-42, doi:10.35335/enrichment.v12i1.198.