APA (7th ed.) Zitazioa
Freyfogle, E. T. (2006). Why conservation is failing and how it can regain ground. Yale University Press.
Chicago Style (17th ed.) Zitazioa
Freyfogle, Eric T. Why Conservation Is Failing and How It Can Regain Ground. New Haven: Yale University Press, 2006.
MLA (9th ed.) Zitazioa
Freyfogle, Eric T. Why Conservation Is Failing and How It Can Regain Ground. Yale University Press, 2006.
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