“The Effect of Teacher Professional Certification and Work Motivation on the Performance of Elementary School Teachers in the Kempas District, Indragiri Hilir Regency”. Primary: Jurnal Pendidikan Guru Sekolah Dasar 13, no. 4 (August 10, 2024): 153–158. Accessed May 12, 2025. https://primary.ejournal.unri.ac.id/index.php/JPFKIP/article/view/31.