Ketersediaan dan profitabilitas pengusahaan traktor di Jawa Barat, Sumatera Utara dan Lampung. Forum Penelitian Agro Ekonomi, [S. l.], v. 9, n. 2-1, p. 21–29, 2016. Disponível em: https://epublikasi.pertanian.go.id/berkala/index.php/fae/article/view/1271. Acesso em: 19 apr. 2025.