Adwiah, A. R., and E. Munastiwi. “Headmaster’s Strategies to Improve the Quality of Education: A Case Study at Kindergarten ABA Warungboto”. JOYCED: Journal of Early Childhood Education, vol. 3, no. 2, Dec. 2023, pp. 105-1, doi:10.14421/joyced.2023.32-03.