Pagsanjan-Estrera, I. (2003). Environmentalists slam Bt corn commercialization: Hunger strike continues. Philippine Collegian.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPagsanjan-Estrera, Iris. "Environmentalists Slam Bt Corn Commercialization: Hunger Strike Continues." Philippine Collegian 2003.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPagsanjan-Estrera, Iris. "Environmentalists Slam Bt Corn Commercialization: Hunger Strike Continues." Philippine Collegian, 2003.
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