Sumar, S. 2021. Implementasi Model Beyond Center and Circle Time (BCCT) Dalam Pembelajaran Berhitung Permulaan Di PAUD Terpadu Biruni Sungailiat Kabupaten Bangka. Jurnal Sustainable. 4, 2 (Dec. 2021), 91-100. DOI:https://doi.org/10.32923/kjmp.v4i2.2193.