Mannic, Teguh Viras, et al. “The Contribution of Principal’s Managerial Competence and Teacher Performance to the Quality of Vocational Education in Mataram City”. Edu Spectrum: Journal of Multidimensional Education, vol. 3, no. 1, June 2025, pp. 1-14, doi:10.70063/eduspectrum.v3i1.137.