Wihana, Hari, and Ernawulan Syaodih. 2022. “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 (1). Bandung, Indonesia, 277-86. http://proceedings.upi.edu/index.php/icee/article/view/1998.