Unwin, E. E. (1922). Religion & biology. George H. Doran Co.; Swarthmore Press.
Lua i Stíl Chicago (17ú heag.)Unwin, Ernest Ewart. Religion & Biology. New York, London: George H. Doran Co.; Swarthmore Press, 1922.
Lua MLA (8ú heag.)Unwin, Ernest Ewart. Religion & Biology. George H. Doran Co.; Swarthmore Press, 1922.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.