Andhita, K. and Untari, R.S. 2023. OPBL Learning Model on Problem Solving Ability in Basic Programming Subjects in Vocational High Schools: Model Pembelajaran OPBL Terhadap Kemampuan Pemecahan Masalah Pada Mata Pelajaran Pemrograman Dasar di Sekolah Menengah Kejuruan. Indonesian Journal of Education Methods Development. 18, 1 (Feb. 2023), 10.21070/ijemd.v21i.726. DOI:https://doi.org/10.21070/ijemd.v21i.726.