Sapnu, R. (1999). Pinay calendar genius wants to wake it to Guiness Book. Philippine Star.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSapnu, Ric. "Pinay Calendar Genius Wants to Wake It to Guiness Book." Philippine Star 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSapnu, Ric. "Pinay Calendar Genius Wants to Wake It to Guiness Book." Philippine Star, 1999.
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