Arifin, Bustanul, Michael Reed, Novi Rosanti, Hanung Ismono, and Slamet Budiyuwono. “Partnership for Sustainable Coffee Certification: Linking Up Smallholder Farmers to Global Coffee Market”. Sustainability Science and Resources 2 (July 15, 2022): 24–44. Accessed September 16, 2024. http://journalssr.com/index.php/ssr/article/view/17.