Gonzales, S. R. O. (1999). Earth's population to hit 6B next month. Philippine Daily Inquirer.
芝加哥风格引文Gonzales, Stella Ruth O. "Earth's Population to Hit 6B Next Month." Philippine Daily Inquirer 1999.
MLA引文Gonzales, Stella Ruth O. "Earth's Population to Hit 6B Next Month." Philippine Daily Inquirer, 1999.
警告：这些引文格式不一定是100％准确.