Zaky, Yahdi, Rachmat Pambudy, and Harianto Harianto. “ANALISIS EFISIENSI USAHATANI TEBU PETANI MITRA DAN NON MITRA DI KABUPATEN BLORA JAWA TENGAH”. Forum Agribisnis : Agribusiness Forum 9, no. 1 (April 7, 2019): 85-106. Accessed March 7, 2021. http://journal.ipb.ac.id/index.php/fagb/article/view/27032.