D. . Agustina, A. . Fajriani, A. S. . Lubis, D. . Anggreini, F. A. Yani, and N. . Firzah, “Improving Health Service Quality Management in Hospitals (Literature Study)”, Maj. Kesehat. Indones., vol. 3, no. 2, pp. 55–60, Oct. 2022.