Adelia, K., Winarno, S. T., & Tondang, I. S. (2026). Analisis Pengendalian Kualitas Green Beans Kopi Menggunakan Metode Statistical Process Control (SPC) di Kopi Bontugu Trawas. Journal of Economics and Management Scienties, 8(4), 1400–1405. https://doi.org/10.37034/jems.v8i4.512