Nurhayati, R., M. Hajaroh, A. Rohman, and E. Sholikhah. “School Readiness in Implementing and Evaluating the Reinforcement of Character Education Program in Yogyakarta City”. KnE Social Sciences, Vol. 6, no. 2, Dec. 2021, pp. 722–732, doi:10.18502/kss.v6i2.10030.