Fauzia NLU, Kelana JB. Natural Science Problem Solving in Elementary School Students Using the Project Based Learning (PjBL) Model. j. ilm. sekol. dasar [Internet]. 2021 Mar. 1 [cited 2024 Dec. 23];4(4):596-603. Available from: https://ejournal.undiksha.ac.id/index.php/JISD/article/view/28377