Sheen, F. J. (1940). A universal norm of morality. Our Sunday Visitor Press.
Lua i Stíl Chicago (17ú heag.)Sheen, Fulton J. A Universal Norm of Morality. Huntington, Ind.: Our Sunday Visitor Press, 1940.
Lua MLA (8ú heag.)Sheen, Fulton J. A Universal Norm of Morality. Our Sunday Visitor Press, 1940.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.