Cahya, Virdies Nur C, Refius Setyanto, and Paradise Paradise. 2025. “Analysis of the Effectiveness of Loyalty Membership Programs in Increasing Customer Retention Using Net Promoter Score (NPS) With Information System Support”. Eduvest - Journal of Universal Studies 5 (9):10974-83. https://doi.org/10.59188/eduvest.v5i9.52060.