Nababan, Benyamin, and Sahat Siagian. “Empowering Teachers’ Professional Competence through the PIKOLAK Training Model (Participatory, Integrative, and Collaborative) With a Blended Learning Approach in Humbang Hasundutan Regency”. International Journal of Humanities and Education Development (IJHED) 7, no. 6 (December 12, 2025): 93–101. Accessed October 23, 2026. https://theshillonga.com/index.php/jhed/article/view/492.