STAFF, PEJ.
 PEJ Editorial Board 2021.
<strong>Philippine Engineering Journal</strong>, [S.l.], v. 42, n. 1, july 2021.
ISSN 2718-9287.
Available at: &lt;<a href="https://www.journals.upd.edu.ph/index.php/pej/article/view/7768" target="_new">https://www.journals.upd.edu.ph/index.php/pej/article/view/7768</a>&gt;. Date accessed: 28 sep. 2025.