Pearce, D. W., & Turner, R. K. (1990). Economics of natural resources and the environment. Johns Hopkins University Press.
Lua i Stíl Chicago (17ú heag.)Pearce, David W., agus R. Kerry Turner. Economics of Natural Resources and the Environment. Baltimore: Johns Hopkins University Press, 1990.
Lua MLA (9ú heag.)Pearce, David W., agus R. Kerry Turner. Economics of Natural Resources and the Environment. Johns Hopkins University Press, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.