Susana, F., Julianto, D., & Suhartono, S. (2023). The Influence of Price and Promotion on Consumer Purchase Decisions at Sumber Makmur Kopi Jember. Electronical Journal Of Social And Political Sciences (E-SOSPOL), 10(1), 79-88. doi:10.19184/e-sospol.v10i1.35783