Saragih, R., A. P. S. Depari, and I. Muda. “Company Performance Monitoring by Objective Key Result (OKR), Profit and Loss Account Approach Pandemic of COVID-19 Era”. International Journal of Health Sciences, vol. 6, no. S1, Apr. 2022, pp. 2759-65, doi:10.53730/ijhs.v6nS1.5198.