Casayuran, M. B. Filipinos becoming largely environmentally conscious. Manila Bulletin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCasayuran, Mario B. "Filipinos Becoming Largely Environmentally Conscious." Manila Bulletin .
एमएलए (9वां संस्करण) प्रशस्ति पत्रCasayuran, Mario B. "Filipinos Becoming Largely Environmentally Conscious." Manila Bulletin, .
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