Kangas, P. C. (2004). Ecological engineering: Principles and practice. Lewis Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKangas, Patrick C. Ecological Engineering: Principles and Practice. Boca Raton: Lewis Publishers, 2004.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKangas, Patrick C. Ecological Engineering: Principles and Practice. Lewis Publishers, 2004.
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