P. D. Nanda, P. S. Ndraha, and S. Ginting, “The Impact of Outdoor Play on Motor Skill Development in Early Childhood: A Systematic Literature Review”, J. Found. Learn. Child Dev, vol. 1, no. 03, pp. 141–156, Sep. 2025, doi: 10.53905/ChildDev.v1i03.19.