Wills, I. A. (2007). Economics and the environment: A signalling and incentives approach (2nd ed.).
Chicago Style aipamenaWills, Ian; Author. Economics and the Environment: A Signalling and Incentives Approach. 2nd ed. New Delhi, Viva Books Private Ltd, 2007.
MLA aipamenaWills, Ian; Author. Economics and the Environment: A Signalling and Incentives Approach. 2nd ed. 2007.
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