Hasan, G., Andrew, A., Agustin, C., Seren , S. and Enjelia, Y. (2023) “Membangun CRM (Customer Relationship Management) Pada Usaha UMKM Bola Ubi di Kota Batam”, eCo-Buss, 6(1), pp. 217–228. doi: 10.32877/eb.v6i1.734.