Kirkby, J., & Kirkby, J. (1995). The earthscan reader in sustainable development. Earthscan.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKirkby, John, और John;O'Keefe Kirkby. The Earthscan Reader in Sustainable Development. Earthscan, 1995.
एमएलए (9वां संस्करण) प्रशस्ति पत्रKirkby, John, और John;O'Keefe Kirkby. The Earthscan Reader in Sustainable Development. Earthscan, 1995.
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