MANSUROTUN, SITI. PENSA E-JURNAL: PENDIDIKAN SAINS, [S. l.], v. 2, n. 01, 2014. DOI: 10.26740/pensa.v2i01.7155. Disponível em: https://ejournal.unesa.ac.id/index.php/pensa/article/view/7155. Acesso em: 17 nov. 2025.