Mujimin M. Objectivitas Penilaian Portofolio Sertifikasi Guru Dalam Jabatan. jpk. Jurnal. Pendidikan. Khusus [Internet]. 2007 May 15 [cited 2025 Jun. 8];3(1). Available from: https://jurnal.uny.ac.id/index.php/jpk/article/view/6411