Fajrina, Suci, Lufri Lufri, and Yuni Ahda. “Science, Technology, Engineering, and Mathematics (STEM) As A Learning Approach to Improve 21st Century Skills: A Review”. International Journal of Online and Biomedical Engineering (iJOE) 16, no. 07 (June 19, 2020): pp. 95–104. Accessed May 2, 2024. https://online-journals.org/index.php/i-joe/article/view/14101.