Samosir, Beslon. 2022. “Improving Student Learning Outcomes With the Application of Problem Based Learning Models in Microprocessor and Microcontroller Subjects at SMK Negeri 2 Pematangsiantar”. International Journal of Multidisciplinary: Applied Business and Education Research 3 (7), 1284-94. https://doi.org/10.11594/ijmaber.03.07.08.