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Sijabat, Desi. “Upaya Meningkatkan Kinerja Mengajar Guru Sekolah Dasar Se-Kecamatan Girsang Sipangan Bolon”. Jurnal Ilmiah Aquinas 4, no. 2 (July 7, 2021): 191–202. Accessed April 19, 2025. https://ejournal.ust.ac.id/index.php/Aquinas/article/view/1220.