Sterba, J. P. (1993). Morality in practice (4th ed.). Wadsworth.
Lua i Stíl Chicago (17ú heag.)Sterba, James P. Morality in Practice. 4th ed. Belmont, Calif: Wadsworth, 1993.
Lua MLA (9ú heag.)Sterba, James P. Morality in Practice. 4th ed. Wadsworth, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.