Gulo, R. S., Y. Zega, S. A. Mendrofa, and E. Telaumbanua. “The Effect of Teacher Performance on Learning Outcomes of Grade VI Students of State Elementary School 070979 Sifalaete Gunungsitoli City”. ProBisnis : Jurnal Manajemen, vol. 16, no. 5, Oct. 2025, pp. 1371-7, https://www.ejournal.joninstitute.org/index.php/ProBisnis/article/view/1155.