Sufa, Feri Faila, Gunarhadi, Muhammad Akhyar, and Munawir. 2020. “Introduce Mathematical Concepts for Early Childhood: Inhibiting and Supporting Factors through Play in Children’s Cognitive Stimulation”. International Journal of Psychosocial Rehabilitation 24 (7): 8650-56. https://doi.org/10.61841/kmb0an05.