“Pentingnya Sertifikasi Dan Profesionalitas Guru”. Sindoro: Cendikia Pendidikan, [S. l.], v. 18, n. 7, 2026. DOI: https://doi.org/10.2238/4z2mwk89. Disponível em: https://journal.cib.institute/index.php/sindoro/article/view/310. Acesso em: 21 oct. 2026.