Antiporda, J. G. (2006). Billboard firms ask to polce their ranks. Manila Times.
芝加哥风格引文Antiporda, Jefferson G. "Billboard Firms Ask to Polce Their Ranks." Manila Times 2006.
MLA引文Antiporda, Jefferson G. "Billboard Firms Ask to Polce Their Ranks." Manila Times, 2006.
警告：这些引文格式不一定是100％准确.