Implementation of the Referral System Policy in the National Health Insurance Scheme at Community Health Centers, Ngawi District, East Java. Journal of Health Policy and Management, [S. l.], v. 2, n. 2, p. 102–111, 2017. Disponível em: https://thejhpm.com/index.php/thejhpm/article/view/29. Acesso em: 29 jan. 2026.