RAMADANI, Sri; ANDRIANI, Rian; MULYANI, Kahar. Competitive Strategies for Hospitals to Enhance Patient Loyalty at Mahkota Bidadari General Hospital in Langkat Regency, North Sumatra. Jurnal Indonesia Sosial Sains, [S. l.], v. 7, n. 6, p. 2701–2717, 2026. DOI: 10.59141/jiss.v7i6.2384. Disponível em: https://jiss.publikasiindonesia.id/index.php/jiss/article/view/2384. Acesso em: 15 jun. 2026.