Arif, M., Idrus, Hasan, and I. Nurjayanti. “The Principal’s Role in Improving Teacher Performance at Junior High School of SMP Negeri 18 Sigi”. Journal of Scientific Research, Education, and Technology (JSRET), vol. 5, no. 2, May 2026, pp. 1454-73, doi:10.58526/jsret.v5i2.1127.