Sari DN, Hamdi S. Is Online Learning Effective Implemented in the Outbreak of Covid-19? (An Evaluation Approach in the Vocational High Schools). Jurnal Pendidikan Teknologi dan Kejuruan [Internet]. 2021 Oct. 16 [cited 2025 May 12];27(2):117-25. Available from: https://journal.uny.ac.id/index.php/jptk/article/view/36107