WIDIASTUTI, S. K. MODEL ON NATURAL SCIENCES SUBJECT (IPA) GRADE IV ELEMENTARY SCHOOL. International Journal of Elementary Education, [S. l.], v. 1, n. 3, p. 206–218, 2017. DOI: 10.23887/ijee.v1i3.11503. Disponível em: https://ejournal.undiksha.ac.id/index.php/IJEE/article/view/11503. Acesso em: 22 dec. 2024.