Efendi, Zaenudin, et al. “The Effect of Online Learning in Teacher Professional Education on the Digital Competence of Kindergarten Teachers”. Jurnal Visionary : Penelitian Dan Pengembangan Dibidang Administrasi Pendidikan, vol. 13, no. 2, Aug. 2025, pp. 172-80, doi:10.33394/vis.v13i2.15577.