Pardjono, Pardjono, Sugiyono Sugiyono, and Aris Budiyono. “Developing a Model of Competency and Expertise Certification Tests for Vocational High School Students”. REID (Research and Evaluation in Education) 1, no. 2 (December 31, 2015): 129–145. Accessed June 4, 2025. https://journal.uny.ac.id/index.php/reid/article/view/6517.