(1995). Valuing the environment: Economic approaches to environmental evaluation : proceedings of a workshop held at Ludgrove Hall, Middlesex Polytechnic, on 13 and 14 June 1990. J. WIley & Sons.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रValuing the Environment: Economic Approaches to Environmental Evaluation : Proceedings of a Workshop Held at Ludgrove Hall, Middlesex Polytechnic, on 13 and 14 June 1990. Chichester: J. WIley & Sons, 1995.
एमएलए (8वां संस्करण) प्रशस्ति पत्रValuing the Environment: Economic Approaches to Environmental Evaluation : Proceedings of a Workshop Held at Ludgrove Hall, Middlesex Polytechnic, on 13 and 14 June 1990. J. WIley & Sons, 1995.
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