Febriyani, N. ., and Y. G. Yudanari. “The Description of Covid-19 Patients With Comorbidities at K.R.M.T Wongsonegoro General Hospital of Semarang”. Proceedings of Conference on Health Universitas Ngudi Waluyo, vol. 1, no. 1, Mar. 2022, pp. 220-4, https://callforpaper.unw.ac.id/index.php/ICH-UNW/article/view/30.