Zulfiandri Z, Maarif MS, Hermawan A, Hardjomidjojo H. The Transformation Process of Cocoa Farmers Groups to Agro-industry Groups in Indonesia: a Soft System Methodology Approach. IJSBAR. 2017;31(1):1-30. Accessed December 6, 2025. https://gssrr.org/JournalOfBasicAndApplied/article/view/6715