Andriani, V., and G. Kusumastuti. “The Effect of the Cooperative Learning Model in Improving the Ability to Recognize Number Symbols for Students With Intellectual Disability”. Edumaspul: Jurnal Pendidikan, Vol. 6, no. 2, Oct. 2022, pp. 1421-4, doi:10.33487/edumaspul.v6i2.4137.