Saragih L, Girsang R, Simatupang P, Purba F. BIMBINGAN TEKNIS ASPEK PEMASARAN ONLINE BAGI UMKM KABUPATEN BATU BARA. EAmal [Internet]. 25May2021 [cited 27Apr.2024];1(2):51-6. Available from: https://stp-mataram.e-journal.id/Amal/article/view/571