Calica, A. (2010). Poll: Noynoy maintains 15-16% lead over Erap. Philippine Star.
芝加哥风格引文Calica, Aurea. "Poll: Noynoy Maintains 15-16% Lead over Erap." Philippine Star 2010.
MLA引文Calica, Aurea. "Poll: Noynoy Maintains 15-16% Lead over Erap." Philippine Star, 2010.
警告：这些引文格式不一定是100％准确.