Ernita, Y., Guna, R. A. H., Santosa, S., & Nofialdi, N. (2017). Analysis of Cocoa Industry Development Factor with System Approach in West Sumatera, Indonesia. International Journal of Sciences: Basic and Applied Research (IJSBAR), 36(3), 122–133. Retrieved from https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/8192