VERGEL, Karl; 						LIDASAN, Hussein.
 A STUDY ON THE STATE OF THE TRANSPORTATION ENVIRONMENT IN METRO MANILA.
<strong>Philippine Engineering Journal</strong>, [S.l.], v. 21, n. 2, feb. 2021.
ISSN 2718-9287.
Available at: &lt;<a href="https://journals.upd.edu.ph/index.php/pej/article/view/7424" target="_new">https://journals.upd.edu.ph/index.php/pej/article/view/7424</a>&gt;. Date accessed: 21 sep. 2025.