Hutagalung, C. H. A., E. Tambunan, C. Kembaren, Y. L. Simbolon, M. S. Panggabean, and M. S. Sagala. “Analysis of Profitability, Return on Investment, and Liquidity Ratios on the Value of LQ45 Companies During the 2017-2021 Period”. Journal of Economics and Business Letters, vol. 3, no. 3, June 2023, pp. 1-6, doi:10.55942/jebl.v3i3.207.