Dwiastuti, Rini, and Indah Mustiko Ningsih. 2017. “ECONOMIC EFFICIENCY OF SOYBEAN FARMING (CASE STUDY IN MLORAH VILLAGE REJOSO DISTRICT NGANJUK REGENCY)”. Agricultural Socio-Economics Journal 16 (3). Malang, Indonesia:97-103. https://agrise.ub.ac.id/index.php/agrise/article/view/205.