Contreras, V. (1999). Study finds up biased against poor. Philippine Daily Inquirer.
芝加哥风格引文Contreras, Voltaire. "Study Finds Up Biased Against Poor." Philippine Daily Inquirer 1999.
MLA引文Contreras, Voltaire. "Study Finds Up Biased Against Poor." Philippine Daily Inquirer, 1999.
警告：这些引文格式不一定是100％准确.