Yoko, Budi, Yusman Syaukat, and Anna Fariyanti. 2017. “Analisis Efisiensi Usahatani Padi Di Kabupaten Lampung Tengah”. Jurnal Agribisnis Indonesia (Journal of Indonesian Agribusiness) 2 (2), 127-40. https://doi.org/10.29244/jai.2014.2.2.127-140.