Nisa, Titin Faridatun, et al. “Membangun Karakter Anak Usia Dini Melalui Pembelajaran Math Character: Building Early Childhood Character through Learning Math Character”. Pedagogia : Jurnal Pendidikan, vol. 5, no. 2, Aug. 2016, pp. 113-24, doi:10.21070/pedagogia.v5i2.241.