Nisa, C., Sundava, S., & Azizah, I. (2023). Peningkatan Karakter Disiplin melalui Apel Pagi Bagi Siswa SD Muhammadiyah 22 Surakarta. Journal on Education, 6(1), 2023-2035. https://doi.org/10.31004/joe.v6i1.3190