Langford, P. (1986). Modern philosophies of human nature: Their emergence from Christian thought. M. Nijhoff.
Lua i Stíl Chicago (17ú heag.)Langford, Peter. Modern Philosophies of Human Nature: Their Emergence from Christian Thought. Dordrecht: M. Nijhoff, 1986.
Lua MLA (9ú heag.)Langford, Peter. Modern Philosophies of Human Nature: Their Emergence from Christian Thought. M. Nijhoff, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.