Rafiq, Arif Ainur, Mochamad Bruri Triyono, and Istanto Wahyu Djatmiko. 2023. “The Integration of Inquiry and Problem-Based Learning and Its Impact on Increasing the Vocational Student Involvement”. International Journal of Instruction 16 (1):659-84. https://e-iji.net/ats/index.php/pub/article/view/221.