James, Elizebert, Nordin Mamat, and Nor Mashitah binti Mohd Radzi. 2022. “Implementation of ‘Spindle Box’ Activity in Improving the Understanding of Additional Operations for 4 Year Old Children: Pelaksanaan Aktiviti ‘Spindle Box’ Dalam Meningkatkan Kefahaman Operasi Tambah Terhadap Kanak-Kanak 4 Tahun”. Jurnal Pendidikan Bitara UPSI 15 (June):117-33. https://doi.org/10.37134/bitara.vol15.sp.12.2022.