Nasrun, Muhammad, et al. “Impact of Industrial With Farmers Partnership Against Cocoa Cultivation Practices in the Luwu Region, South Sulawesi”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 30, no. 5, Dec. 2016, pp. 361-74, https://gssrr.org/JournalOfBasicAndApplied/article/view/6686.