Mansi, Ayu Aprilia and Hudoyo, Agus and Soelaiman, Achdiansyah ANALISIS PENDAPATAN DAN BIAYA POKOK PRODUKSI USAHATANI UBI KAYU DI KECAMATAN BANDAR MATARAM KABUPATEN LAMPUNG TENGAH (Profit and Production Cost Analysis of Cassava Farming at Bandar Mataram District Center of Lampung). Website. (Unpublished)