V. N. J. . Rotty, H. . Ngadiorejo, N. L. . Sampouw, I. J. . Tengker, and R. J. . Kalesaran, “The Role of the Principal in Optimizing Teaching Factory Services in Vocational High Schools (SMK): A Study at SMK Negeri 3 Tondano”, IJITE, vol. 4, no. 3, pp. 1–13, Jun. 2025.