Castaño, J. E. I. (1999). Ivantans recall the day a strong quake ruined their 81 years ago. Philippine Star.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCastaño, Jack E. III. "Ivantans Recall the Day a Strong Quake Ruined Their 81 Years Ago." Philippine Star 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCastaño, Jack E. III. "Ivantans Recall the Day a Strong Quake Ruined Their 81 Years Ago." Philippine Star, 1999.
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