Espinosa, A. B. (1997). Ecozones of prosperity springing up everywhere. Philippine Daily Inquirer.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEspinosa, Aries B. "Ecozones of Prosperity Springing Up Everywhere." Philippine Daily Inquirer 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्रEspinosa, Aries B. "Ecozones of Prosperity Springing Up Everywhere." Philippine Daily Inquirer, 1997.
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