Attfield, R. (1995). Value, obligation, and meta-ethics. Editions Rodopi.
Lua i Stíl Chicago (17ú heag.)Attfield, Robin. Value, Obligation, and Meta-ethics. Amsterdam ; Atlanta, Ga.: Editions Rodopi, 1995.
Lua MLA (9ú heag.)Attfield, Robin. Value, Obligation, and Meta-ethics. Editions Rodopi, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
