Lady, L., Andrew, A., Agustin, C., Seren, S. and Enjelia, Y. 2023. Implementasi Digital Marketing pada UMKM Bola Ubi Kopong Batam Center . eCo-Fin. 5, 3 (Oct. 2023), 157–166. DOI:https://doi.org/10.32877/ef.v5i3.781.