Seman, Norhaizian. “Pedagogical Content Knowledge on Early Mathematics Among Malaysia’s Preschool Teachers: A Literature Review”. International Journal of Psychosocial Rehabilitation 24, no. 6 (June 30, 2020): 5308–5317. Accessed August 8, 2025. https://psychosocial.com/index.php/ijpr/article/view/7020.