Bersih K, Margunayasa IG. Demonstration-Based Learning Videos on the Topic of Substance Changes in Elementary Schools. j. ilm. sekol. dasar [Internet]. 2021 Jun. 2 [cited 2024 Dec. 2];5(2):279-88. Available from: https://ejournal.undiksha.ac.id/index.php/JISD/article/view/34689