Simanjuntak, M.Y. et al. 2022. Effect of Price Promotion and Quality Service On Loyalty Customers At PT. Media Antar Nusa (Nusanet) Medan. International Journal of Economic, Technology and Social Sciences (Injects). 3, 1 (Jun. 2022), 83–90. DOI:https://doi.org/10.53695/injects.v3i1.653.