Rabiali, La Ode Muhammad, Ricky Avenzora, and Sofyan Sjaf. 2018. “Effectiveness and Sustainability of Environmental NGO Performance in Reforestation Activities”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 37 (2): 23-46. https://www.gssrr.org/JournalOfBasicAndApplied/article/view/8673.