Pelamonia, J., C. Ginting, E. Kempa, D. Tobing, and M. Leasa. “Students’ Critical Thinking Skills Based on the STEAM Approach: The Issue of Waste Recycling and Ecology”. Journal of Environment and Sustainability Education, vol. 3, no. 3, Sept. 2025, pp. 396-13, doi:10.62672/joease.v3i3.95.