Ramadani, Sri, Rian Andriani, and Kahar Mulyani. “Competitive Strategies for Hospitals to Enhance Patient Loyalty at Mahkota Bidadari General Hospital in Langkat Regency, North Sumatra”. Jurnal Indonesia Sosial Sains 7, no. 6 (June 15, 2026): 2701–2717. Accessed June 15, 2026. https://jiss.publikasiindonesia.id/index.php/jiss/article/view/2384.