Pojman, L. P., & Pojman, P. (2012). Environmental ethics: Readings in theory and application (Sixth edition, International edition.). Wadsworth.
Lua i Stíl Chicago (17ú heag.)Pojman, Louis P., agus Paul Pojman. Environmental Ethics: Readings in Theory and Application. Sixth edition, International edition. Boston, Mass: Wadsworth, 2012.
Lua MLA (9ú heag.)Pojman, Louis P., agus Paul Pojman. Environmental Ethics: Readings in Theory and Application. Sixth edition, International edition. Wadsworth, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.