Abdullah, Nor Adibah binti. “The Effectivenes of KOBUNA in Primary pupils’ Rounding Skill: Keberkesanan Penggunaan KOBUNA Dalam Kemahiran Membundar Murid Sekolah Rendah”. Jurnal Pendidikan Sains dan Matematik Malaysia 11, no. 1 (April 12, 2021): 30–38. Accessed April 25, 2024. https://ejournal.upsi.edu.my/index.php/JPSMM/article/view/3869.