Sunge, Arman, Rukiah Nggilu, and Lisda Van Gobel. “Analysis of the Implementation of the Horizontal Referral System Among Health Facilities in Serving BPJS Patients at UPTD Puskesmas Sumalata”. Abdurrauf Social Science 2, no. 2 (October 30, 2025): 249–260. Accessed June 4, 2026. https://journal.abdurraufinstitute.org/index.php/arsos/article/view/400.