Fatimah Hasibuan, S., R. Sutatminingsih, and B. Maulina Ozar. “Concrete Pictorial Abstract (CPA) Method-Based Intervention to Improve Understanding of Two-Digit Addition Concepts in Children With Mathematics Learning Difficulties”. Attadib Journal of Elementary Education, vol. 9, no. 3, Dec. 2025, pp. 760-83, doi:10.32832/at-tadib.v9i3.22314.