Unite, B. K. 1st earthquake-resistant bridge starts construction in Surigao. Manila Bulletin.
Cita Chicago (17th ed.)Unite, Betheena Kae. "1st Earthquake-resistant Bridge Starts Construction in Surigao." Manila Bulletin .
Cita MLA (9th ed.)Unite, Betheena Kae. "1st Earthquake-resistant Bridge Starts Construction in Surigao." Manila Bulletin, .
Atenció: Aquestes cites poden no estar 100% correctes.