(1997). Philippine Civil Aviation: Is it prepared for the 21st century. Manila Bulletin.
Cita Chicago (17th ed.)"Philippine Civil Aviation: Is It Prepared for the 21st Century." Manila Bulletin 1997.
Cita MLA (9th ed.)"Philippine Civil Aviation: Is It Prepared for the 21st Century." Manila Bulletin, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.