Analisis kebijakan harga TBS Kelapa sawit pada PIR Perkebunan Sei Besitang Sumatera Utara. Forum Penelitian Agro Ekonomi, [S. l.], v. 6, n. 2, p. 61–70, 2016. Disponível em: https://epublikasi.pertanian.go.id/berkala/index.php/fae/article/view/1216. Acesso em: 19 apr. 2025.