Gunawan W, Atiqoh A, Wiyarno Y, Suharti S, Rusmawati RD. The Influence Of PBL Models, Demonstrations And Initial Knowledge On Increasing Learning Achievement. ej [Internet]. 2024Jan.9 [cited 2025Mar.10];7(2):268-79. Available from: https://jurnal.unipar.ac.id/index.php/ej/article/view/1287