Suryana, Achmad, and Adang Agustian. “Analisis Daya Saing Usaha Tani Jagung Di Indonesia”. Analisis Kebijakan Pertanian, vol. 12, no. 2, Aug. 2016, pp. 143-56, https://epublikasi.pertanian.go.id/berkala/akp/article/view/1084.