Humanika, Erasmus, Dona Wahyuning Laily, and Heru Irianto. 2025. “Upstream Supply Chain Performance Efficiency: Case Study of Creator Coffee Roaster in Yogyakarta”. Jurnal AGRISEP: Kajian Masalah Sosial Ekonomi Pertanian Dan Agribisnis 24 (02):601-16. https://doi.org/10.31186/jagrisep.24.02.601-616.