Sicam, E. L. (1999). Travel time is still going strong after 13 years. Philippine Daily Inquirer.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSicam, Edmund L. "Travel Time Is Still Going Strong After 13 Years." Philippine Daily Inquirer 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSicam, Edmund L. "Travel Time Is Still Going Strong After 13 Years." Philippine Daily Inquirer, 1999.
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