Syamofi, Sutas. “Authenticity, Trust, Affect, and Loyalty in Indonesia’s Specialty Coffee Market: Evidence from Upala Coffee & Eatery”. Journal of Economics and Business Letters 4, no. 4 (October 28, 2025): 29–36. Accessed November 4, 2025. https://journal.privietlab.org/index.php/JEBL/article/view/236.