Esto, R. (1988). World scientists and inventors, including Filipino scientists and technologists. R.E. Books Marketing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEsto, Rey. World Scientists and Inventors, Including Filipino Scientists and Technologists. Valenzuela, Metro Manila: R.E. Books Marketing, 1988.
एमएलए (9वां संस्करण) प्रशस्ति पत्रEsto, Rey. World Scientists and Inventors, Including Filipino Scientists and Technologists. R.E. Books Marketing, 1988.
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