Puspita, Debby May, and Edy Surya. “Development of Snake-Ladder Game As a Medium of Mathematics Learning for the Fourth-Grade Students of Primary School”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 33, no. 3 (June 8, 2017): 291–300. Accessed May 3, 2024. https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/7538.