Angelia Dwi Ceissa, Indra Gamayanto, and Sasono Wibowo. “Optimizing Customer Loyalty Through The Information System Customer Approach at Harapan Hospitals”. Journal of Applied Informatics and Computing 9, no. 2 (March 18, 2025): 373–382. Accessed March 20, 2025. https://jurnal.polibatam.ac.id/index.php/JAIC/article/view/9202.