Wihana, Hari, and Ernawulan Syaodih. “Is the Craft-Making Materials in Elementary School Student Books 2013 Curriculum Suitable With 3R (Reduce, Reuse, Recycle) Principles?”. International Conference on Elementary Education 4, no. 1 (April 14, 2022): 277-286. Accessed May 3, 2024. http://proceedings.upi.edu/index.php/icee/article/view/1998.