Valencia, L. R. (2001). Tough days ahead for RP airline industry. Manila Times.
芝加哥风格引文Valencia, Lynda R. "Tough Days Ahead for RP Airline Industry." Manila Times 2001.
MLA引文Valencia, Lynda R. "Tough Days Ahead for RP Airline Industry." Manila Times, 2001.
警告：这些引文格式不一定是100％准确.