Ulandari, Nikita, and Risa Kartika Lubis. 2020. “The Effect of Giving Discounts and Service Quality on Sales at PT Midi Utama Indonesia Tbk Alfamidi Branch of SM Raja 4 Medan”. Journal of Economics and Business (JECOMBI) 2 (1):91-96. https://doi.org/10.58471/jecombi.v2i1.12.