Rachmat, Rachmat, and Suhartono Suhartono. “Comparative Analysis Method Single Exponential Smoothing Method and Holt’s Recovery in Hospital Services in General Hospital”. International Journal of Recent Contributions from Engineering, Science & IT (iJES), vol. 8, no. 3, Sept. 2020, pp. pp. 51-58, doi:10.3991/ijes.v8i3.16705.