“Influence of Quality Improvement Activities and Direct Selling Through Mediated Partnership Model on Supply Chain, Farm-Gate Price and Indonesian Households Specialty Coffee Farmers’ Income”. Pelita Perkebunan (a Coffee and Cocoa Research Journal) 32, no. 1 (April 30, 2016): 52–66. Accessed April 29, 2026. https://www.ccrjournal.com/index.php/ccrj/article/view/.