Nugroho, Yunianto, Riyanto Riyanto, Joni Iskandar, Mustar Aman, and Nuri Wiyono. 2023. “Web-Based Patient Referral System Design from Clinic to Hospital Using Object Oriented Programming System”. Journal of Information Systems and Informatics 5 (1), 87-101. https://doi.org/10.51519/journalisi.v5i1.425.