John Friadi, Ganefri, Ridwan , Raimon Efendi. “Development of Product Based Learning-Teaching Factory in the Disruption Era”. International Journal of Advanced Science and Technology 29, no. 06 (April 30, 2020): 1887 - 1898. Accessed June 10, 2026. http://sersc.org/journals/index.php/IJAST/article/view/12892.