De Garis, B. K. (1979). European impact on the west Australian environment, 1829-1979. University of Western Australia : distributed by University of Western Australian Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDe Garis, B. K. European Impact on the West Australian Environment, 1829-1979. Nedlands, W.A.: University of Western Australia : distributed by University of Western Australian Press, 1979.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDe Garis, B. K. European Impact on the West Australian Environment, 1829-1979. University of Western Australia : distributed by University of Western Australian Press, 1979.
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