; ; ; . Jurnal Ilmiah Sains, [S. l.], v. 15, n. 1, p. 59–65, 2015. DOI: 10.35799/jis.15.1.2015.8303. Disponível em: https://ejournal.unsrat.ac.id/v3/index.php/JIS/article/view/8303. Acesso em: 17 mei. 2024.