Nurhayati, Fitri, and Harun Rasyid. “Implementation of Outdoor Games to Improve 4-5 Year Old Childrens Number Sense”. Jurnal Obsesi : Jurnal Pendidikan Anak Usia Dini 3, no. 1 (January 3, 2019): 10–17. Accessed May 8, 2026. https://mail.obsesi.or.id/index.php/obsesi/article/view/133.