Cahyana, Cahyana, Ghullam Hamdu, Dindin Abdul Muiz Lidinillah, and Seni Apriliya. “Electrical Tandem Roller (ETR) Media for 4C Capabilities Based Stem Learning Elementary Schools”. International Journal of Elementary Education 4, no. 2 (July 23, 2020): 169–178. Accessed December 22, 2024. https://ejournal.undiksha.ac.id/index.php/IJEE/article/view/25205.