Cafaro, P., & Sandler, R. (2010). Virtue ethics and the environment. Springer.
Lua i Stíl Chicago (17ú heag.)Cafaro, Philip, agus Ronald Sandler. Virtue Ethics and the Environment. Dordrecht: Springer, 2010.
Lua MLA (9ú heag.)Cafaro, Philip, agus Ronald Sandler. Virtue Ethics and the Environment. Springer, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.