Sumitro Monoarfa, Soemarno, Abdul Wahib Muhaimin, Mohamad Iqbal Bahuwa. 2020. “Agroforestry Systems Management Pattern Based On Sustainable In Gorontalo, Indonesia”. International Journal of Advanced Science and Technology 29 (12s), 662 -78. http://sersc.org/journals/index.php/IJAST/article/view/22407.