Yuliati, N. K., N. M. S. Nopiyani, and D. P. Duarsa. “The Roles of Case Managers and Problems Encountered in Implementing Patient Centered Care in Hospitals”. Public Health and Preventive Medicine Archive, vol. 7, no. 2, Dec. 2019, pp. 140-7, doi:10.53638/phpma.2019.v7.i2.p11.