STAFF, PEJ.
 Table of Contents.
<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/7766" target="_new">https://www.journals.upd.edu.ph/index.php/pej/article/view/7766</a>&gt;. Date accessed: 27 sep. 2025.