Oliva, E. L. (2003). Pinoymail founder quits joins Sun Cellular team. Philippine Daily Inquirer.
Chicago-čujuhus (17. p.)Oliva, Erwin Lemuel. "Pinoymail Founder Quits Joins Sun Cellular Team." Philippine Daily Inquirer 2003.
MLA-čujuhus (9. p.)Oliva, Erwin Lemuel. "Pinoymail Founder Quits Joins Sun Cellular Team." Philippine Daily Inquirer, 2003.
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