Rewan Jayadi, and Siska Yosmar. “SMART BOOK MATHEMATIC FOR DIFABEL (SOMABEL): WEBSITE-BASED MATHEMATICS LEARNING MEDIA FOR MENTALLY DISABLED STUDENTS USING CARDBOARD WASTE”. EduMatSains : Jurnal Pendidikan, Matematika dan Sains 8, no. 2 (February 1, 2024): 217–227. Accessed April 2, 2025. http://ejournal.uki.ac.id/index.php/edumatsains/article/view/4685.