Sari, T. E., & Siswahyudianto, S. (2023). Analysis of Customer Relationship Management Implementation in Maintaining Customer Loyalty in UMKM Bakpia Ahmad’s Family Trenggalek. Madani: Jurnal Politik Dan Sosial Kemasyarakatan, 15(1), 225–243. https://doi.org/10.52166/madani.v15i01.4096