Nafik, Isya, and Nur Efendi. “The Effect of Project Based Learning Model on Science Learning Outcomes for Grade 4 Elementary School”. Academia Open 70 (December 31, 2022): 10.21070/acopen.7.2022.4291. Accessed April 25, 2024. https://acopen.umsida.ac.id/index.php/acopen/article/view/4291.