Sotto, A. (1997). Ka Ipe is an unflagging proponet of the invisible camera. Philippine Daily Inquirer.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSotto, Agustin. "Ka Ipe Is an Unflagging Proponet of the Invisible Camera." Philippine Daily Inquirer 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSotto, Agustin. "Ka Ipe Is an Unflagging Proponet of the Invisible Camera." Philippine Daily Inquirer, 1997.
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