PANGGABEAN, J. F. R., and K. Sirait. “PERSONNEL PERFORMANCE ASSESSMENT INFORMATION SYSTEM AT PT. ABDI GABE USING BARS METHOD”. Jurnal Mantik, vol. 5, no. 2, Aug. 2021, pp. 1305-12, https://iocscience.org/ejournal/index.php/mantik/article/view/1502.