Arief Rahman Yusuf. Implementation of Online STEM-PjBL through Various Learning Platforms in Vocational High Schools during Covid-19 Pandemic. Elementary Education Online [Internet]. 2023 Dec. 15 [cited 2024 Jun. 3];20(2):1-8. Available from: https://ilkogretim-online.org/index.php/pub/article/view/2741