Abadilla, D. C. (1988). The four laws of ecology. Education Forum, Teacher Assistance Program of the Association of Major Religious Superiors of the Philippines.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAbadilla, Domingo C. The Four Laws of Ecology. Quezon City: Education Forum, Teacher Assistance Program of the Association of Major Religious Superiors of the Philippines, 1988.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAbadilla, Domingo C. The Four Laws of Ecology. Education Forum, Teacher Assistance Program of the Association of Major Religious Superiors of the Philippines, 1988.
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