(1997). Philippine Civil Aviation: Is it prepared for the 21st century. Manila Bulletin.
Citazione stile Chigago Style (17a edizione)"Philippine Civil Aviation: Is It Prepared for the 21st Century." Manila Bulletin 1997.
Citatione MLA (9a ed.)"Philippine Civil Aviation: Is It Prepared for the 21st Century." Manila Bulletin, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.