Ithnain, Isnormaniza. “Effective Professional Development Model Increases the Competence of Vocational Teachers: Model Pembangunan Profesional Efektif Meningkatkan Kompetensi Guru Vokasional ”. Management Research Journal, vol. 11, no. 2, Dec. 2022, pp. 52-63, https://doi.org/10.37134/mrj.vol11.2.5.2022.