Andriadi, A., Ismail, R., Fikarwin, F., Badaruddin, B., Manurung, R., & Sitorus, H. (2019). Coffee Marketing Mechanism: Social Relations Between Farmers, Collectors, Certification Cooperatives, and Exporters in Aceh, Indonesia. Pelita Perkebunan (a Coffee and Cocoa Research Journal), 35(2), 156-166. https://doi.org/10.22302/iccri.jur.pelitaperkebunan.v35i2.383