Ananda Lubis, Fajar Rezeki, and Vina Winda Sari. 2022. “The Effect of Incentives and Work Stress on Employee Performance During the Covid-19 Pandemic at PTPN IV Plantation Land”. Jurnal Mantik 5 (4):2219-23. https://www.iocscience.org/ejournal/index.php/mantik/article/view/1967.