Widjaya, Dani, and Rizky Yanuarti. “Mapping Coffee Base Countries in the World: Case Studies from Three Continents (Africa-America-Asia).”. Pelita Perkebunan (a Coffee and Cocoa Research Journal) 40, no. 1 (April 29, 2024): 61-75. Accessed October 25, 2025. https://ccrjournal.com/index.php/ccrj/article/view/593.