Trigg, R. (2005). Morality matters. Blackwell Pub..
Lua i Stíl Chicago (17ú heag.)Trigg, Roger. Morality Matters. Malden, MA: Blackwell Pub., 2005.
Lua MLA (8ú heag.)Trigg, Roger. Morality Matters. Blackwell Pub., 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.