Yulianita, Siska. “ANALISIS EFESIENSI FAKTOR PRODUKSI USAHATANI KENTANG (Solanum Tuberosum)”. Journal of Business, Finance, and Economics (JBFE) 3, no. 2 (June 21, 2023): 213–221. Accessed April 4, 2025. http://journal.univetbantara.ac.id/index.php/jbfe/article/view/4121.