Posner, R. A. (1999). The problematics of moral and legal theory. Belknap Press of Harvard University Press.
Lua i Stíl Chicago (17ú heag.)Posner, Richard A. The Problematics of Moral and Legal Theory. Cambridge: Belknap Press of Harvard University Press, 1999.
Lua MLA (9ú heag.)Posner, Richard A. The Problematics of Moral and Legal Theory. Belknap Press of Harvard University Press, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.