Dewey, R. E., & Hurlbutt, R. H. (1977). An introduction to ethics. Macmillan.
Lua i Stíl Chicago (17ú heag.)Dewey, Robert E., agus Robert H. Hurlbutt. An Introduction to Ethics. New York: Macmillan, 1977.
Lua MLA (9ú heag.)Dewey, Robert E., agus Robert H. Hurlbutt. An Introduction to Ethics. Macmillan, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.