VILLASEÑOR, Irene M..
 -.
<strong>Science Diliman: A Journal of Pure and Applied Sciences</strong>, [S.l.], v. 27, n. 1, july 2015.
ISSN 2012-0818.
Available at: &lt;<a href="https://www.journals.upd.edu.ph/index.php/sciencediliman/article/view/4637" target="_new">https://www.journals.upd.edu.ph/index.php/sciencediliman/article/view/4637</a>&gt;. Date accessed: 28 sep. 2025.