Oliva, E. L. G. (2001). E-mail, news still most popular Net applications, content. Philippine Daily Inquirer.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOliva, Erwin Lemuel G. "E-mail, News Still Most Popular Net Applications, Content." Philippine Daily Inquirer 2001.
एमएलए (9वां संस्करण) प्रशस्ति पत्रOliva, Erwin Lemuel G. "E-mail, News Still Most Popular Net Applications, Content." Philippine Daily Inquirer, 2001.
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