APA (7th ed.) Zitazioa

(1981). Economics of environmental and natural resources policy. Westview Pr.

Chicago Style (17th ed.) Zitazioa

Economics of Environmental and Natural Resources Policy. Boulder, Colo: Westview Pr, 1981.

MLA (9th ed.) Zitazioa

Economics of Environmental and Natural Resources Policy. Westview Pr, 1981.