Amin, N., N. Nandang, and Farid Gunadi. “PENGARUH PENDEKATAN CONCRETE PICTORIAL ABSTRACT TERHADAP HASIL BELAJAR SISWA MATERI KESEBANGUNAN”. Prosiding Seminar Nasional Matematika Dan Sains, July 2021, pp. 1-7, https://prosiding.biounwir.ac.id/article/view/96.