Marhaban, I. M., and A. H. Masnan. “Keberkesanan Alat Inovasi 2C (Clip & Count) Dalam Aktiviti Operasi Tambah Terhadap Kanak-Kanak Tadika: The Effectiveness of 2C (Clip & Count) Innovation Tools in Addition Operations Activities for Kindergarten Children”. Jurnal Pendidikan Awal Kanak-Kanak Kebangsaan, vol. 9, Dec. 2020, pp. 127-42, https://ejournal.upsi.edu.my/index.php/JPAK/article/view/4547.