Rachmawati, Dian, Sri Handayani, and Lisa Rokhmani. “Competence of Economic Teachers in the Industrial Revolution Era 4.0: Case Study at State High Schools in Malang City, Indonesia”. KnE Social Sciences 4, no. 6 (March 23, 2020): 1286–1290. Accessed May 30, 2020. https://knepublishing.com/index.php/KnE-Social/article/view/6679.