Suratman, Bambang, Yoyok Soesatyo, Raya Sulistyowati, and Waspodo Tjipto Subroto. 2017. “Development Model and Small Medium Industry Strategy in Gerbang Kertosusilo Indonesia”. International Review of Management and Marketing 7 (4):171-79. https://econjournals.com./index.php/irmm/article/view/5350.