Echeminada, P. (1997). Valdez on Charter change: Joke only. Philippine Star.
芝加哥风格引文Echeminada, Perseus. "Valdez on Charter Change: Joke Only." Philippine Star 1997.
MLA引文Echeminada, Perseus. "Valdez on Charter Change: Joke Only." Philippine Star, 1997.
警告：这些引文格式不一定是100％准确.