(1997). Philippine Civil Aviation: Is it prepared for the 21st century. Manila Bulletin.
芝加哥风格引文"Philippine Civil Aviation: Is It Prepared for the 21st Century." Manila Bulletin 1997.
MLA引文"Philippine Civil Aviation: Is It Prepared for the 21st Century." Manila Bulletin, 1997.
警告：这些引文格式不一定是100％准确.