Jurnal Ilmiah Sains, [S. l.], v. 16, n. 2, p. 98–103, 2017. DOI: 10.35799/jis.16.2.2016.15058. Disponível em: https://ejournal.unsrat.ac.id/v3/index.php/JIS/article/view/15058. Acesso em: 19 mei. 2024.