Y. Sihotang, W. ., Girsang, E. ., I.N. Silangit, S. ., & A.F. Depari, S. . (2022). Implementation of Lean Management for Covid-19 Patient Services at Hospitals in Deli Serdang. International Journal of Health and Pharmaceutical (IJHP), 3(1), 55–62. https://doi.org/10.51601/ijhp.v3i1.119