Azahari, Delima Hasri. “Hilirisasi Kelapa Sawit: Kinerja, Kendala, Dan Prospek”. Forum Penelitian Agro Ekonomi, vol. 36, no. 2, Dec. 2019, pp. 81-95, https://epublikasi.pertanian.go.id/berkala/fae/article/view/1134.