Reyes, R. S. (1997). Ayala Foundation to use IT in study of Philippine history. Manila Bulletin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रReyes, Riz S. "Ayala Foundation to Use IT in Study of Philippine History." Manila Bulletin 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्रReyes, Riz S. "Ayala Foundation to Use IT in Study of Philippine History." Manila Bulletin, 1997.
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