Hardani, Retno Nur, and Luluk Iffatur Rocmah. “Increasing The Ability To Recognize Number Symbols Through The Activities Of Playing Snakes And Stairs For Children Of Group A In Tk Aisyiyah Busthanul Athfal 6 Candi”. Academia Open 50 (August 23, 2021): 10.21070/acopen.5.2021.2221. Accessed May 7, 2024. https://acopen.umsida.ac.id/index.php/acopen/article/view/2221.