Hartanto, Ramadhan Bagus, Fitroh Adilla, and Zunan Setiawan. “Loyalty Programs and Customer Retention in the Hospitality Sector: A Study at Rumah Jawa Syariah Guest House”. RIGGS: Journal of Artificial Intelligence and Digital Business 4, no. 4 (December 18, 2025): 5711–5720. Accessed January 31, 2026. https://journal.ilmudata.co.id/index.php/RIGGS/article/view/4475.