Ilham, Nyak, et al. “PENGEMBANGAN USAHA INTEGRASI SAWIT SAPI: DUKUNGAN LEGISLASI DAN STAKEHOLDER”. Forum Penelitian Agro Ekonomi, vol. 39, no. 1, Dec. 2021, pp. 1–9, https://epublikasi.pertanian.go.id/berkala/fae/article/view/3598.