Harahap, H.S. et al. 2021. Pemanfaatan Digital Marketing Bagi UMKM. Jurnal Loyalitas Sosial: Journal of Community Service in Humanities and Social Sciences. 3, 2 (Oct. 2021), 77–85. DOI:https://doi.org/10.32493/JLS.v3i2.p77-85.