Suprijanto, Edi, and Suharsimi Arikunto. “Efektivitas Pengelolaan Kegiatan Kelompok Kerja Guru (KKG) Di Kecamatan Rembang, Purbalingga, Jawa Tengah”. Jurnal Penelitian Ilmu Pendidikan 9, no. 2 (February 7, 2017): 141–151. Accessed June 26, 2025. https://journal.uny.ac.id/index.php/jpip/article/view/12914.