Fromm, H. (2009). The nature of being human: From environmentalism to consciousness. Johns Hopkins University Press.
Lua i Stíl Chicago (17ú heag.)Fromm, Harold. The Nature of Being Human: From Environmentalism to Consciousness. Baltimore, Md.: Johns Hopkins University Press, 2009.
Lua MLA (9ú heag.)Fromm, Harold. The Nature of Being Human: From Environmentalism to Consciousness. Johns Hopkins University Press, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.