Simatupang, N. D., S. A. Sholichah, and I. A. Simanjuntak. “Introduction to Counting Symbols in Early Childhood With Stick Math (STIKMA) Educational Tool Games ”. Jurnal Pendidikan Usia Dini, Vol. 17, no. 2, Nov. 2023, pp. 297 -11, doi:10.21009/JPUD.172.08.