Setiawan, Avi Budi, Ngatindriatun Ngatindriatun, and Karsinah Karsinah. 2019. “Technical Efficiency of Yam Commodity in Semarang Regency”. Jurnal Pendidikan Ekonomi Dan Bisnis (JPEB) 7 (2):137-45. https://doi.org/10.21009/JPEB.007.2.5.