Rachman, Kufita, Nofian Nur Romadhon, and Alvindi Rossa Nurjayanti. “Development of Interactive Flipbooks on Positive and Negative Integer Counting Operation Materials for Elementary School Students”. MATH-EDU: Jurnal Ilmu Pendidikan Matematika 10, no. 2 (August 31, 2025): 236–247. Accessed January 10, 2026. http://jurnal.unimor.ac.id/JIPM/article/view/9135.