Ayres, I. (2005). Optional law: The structure of legal entitlements. University of Chicago Press.
Lua i Stíl Chicago (17ú heag.)Ayres, Ian. Optional Law: The Structure of Legal Entitlements. Chicago: University of Chicago Press, 2005.
Lua MLA (9ú heag.)Ayres, Ian. Optional Law: The Structure of Legal Entitlements. University of Chicago Press, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.