Suharti, T., D. Yudhawati, A. Kusumah, and B. Fatimah. “Portfolio Performance Analysis Using the Treynor Model in the Early Period of the Covid-19 Pandemic”. INOVATOR, vol. 13, no. 1, Mar. 2024, pp. 128-36, doi:10.32832/inovator.v13i1.17663.