Wibowo, R. A. P., and O. F. Sitorus. “Penerapan Digital Marketing Dalam Mempertahankan UMKM Di Masa Pandemi Covid-19”. Management Studies and Entrepreneurship Journal (MSEJ), vol. 3, no. 4, Sept. 2022, pp. 2283-91, doi:10.37385/msej.v3i4.824.