Thomas, J. M., & Thomas, J. M. (2007). Environmental economics: Applictions, policy, and theory. Thomson South-Western.
Lua i Stíl Chicago (17ú heag.)Thomas, Janet M., agus Janet M. Thomas. Environmental Economics: Applictions, Policy, and Theory. Thomson South-Western, 2007.
Lua MLA (8ú heag.)Thomas, Janet M., agus Janet M. Thomas. Environmental Economics: Applictions, Policy, and Theory. Thomson South-Western, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.