Gunawan, Wawan, Atiqoh Atiqoh, Yoso Wiyarno, Suharti Suharti, and Retno Danu Rusmawati. “The Influence Of PBL Models, Demonstrations And Initial Knowledge On Increasing Learning Achievement”. Education Journal : Journal Educational Research and Development 7, no. 2 (January 9, 2024): 268–279. Accessed August 3, 2025. https://jurnal.unipar.ac.id/index.php/ej/article/view/1287.