ULANDARI, N.; RISA KARTIKA LUBIS. 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), [S. l.], v. 2, n. 1, p. 91–96, 2020. DOI: 10.58471/jecombi.v2i1.12. Disponível em: https://jecombi.seaninstitute.or.id/index.php/JECOMBI/article/view/12. Acesso em: 19 oct. 2025.